Men's underwear is the base layer worn directly against your skin, providing support, coverage and comfort beneath clothing. It comes in five distinct cuts, each suited to different bodies and occasions. Choosing the right men's underwear comes down to three things: cut, fabric and fit. Get all three right and you'll barely think about your underwear all day. Get one wrong and it's all you'll think about.
The best pair lands at the intersection of a pouch that actually supports your body's natural shape, a fabric that breathes and moves, and a waistband that doesn't migrate south by lunchtime.
Quick Answer- Five main cuts: briefs, trunks, boxer briefs, thongs and jockstraps. Each suits different bodies and occasions.
- Best fabric for most men: bamboo viscose offers breathability, moisture-wicking and softness that cotton struggles to match at the same weight.
- Fit rule: measure your natural waist and buy to that number, not your trouser size.
- Longevity secret: cold machine wash, gentle cycle, hang dry. That one habit alone extends lifespan significantly.
What Are the Different Types of Men's Underwear?
Men's underwear comes in five main cuts: briefs, trunks, boxer briefs, thongs and jockstraps. Each has a specific coverage profile, support level and ideal use case. The right starting point is knowing what each cut actually does before deciding which one belongs in your drawer.
A quick note on terminology. Some names, "briefs" for instance, are used for both men's and women's underwear. The constructions are built completely differently. Men's cuts are engineered around a pouch at the front for anatomical support and a waistband built to sit flat against the hip or waist without rolling. Women's cuts lack that pouch and are shaped differently throughout. If the name sounds familiar from both aisles, look at the build, not the label.
Briefs
The classic cut. Briefs sit at or just below the natural waist, with leg openings that come up to the hip and full support at the front. Nothing shifts, nothing bunches. They're the most supportive everyday option and work particularly well under fitted trousers or tailored clothing. TBô's briefs follow this profile with the ManShaped contour pouch built in for natural shape and support.
Pros: maximum support; no leg fabric to bunch under trousers; clean silhouette under tailored clothing. Cons: higher leg cut can show under shorts; not everyone is comfortable with the bolder profile.
Trunks
Trunks are the shorter-legged cousin of the boxer brief. They sit lower on the hip than briefs and have a square-cut leg that ends at mid-thigh or above. The silhouette is clean and modern, looks sharp at the beach and sits neatly under slim-fit jeans. They strike a reliable balance between coverage and freedom.
Pros: versatile silhouette; works under most clothing; beach-ready without a wardrobe change. Cons: less thigh coverage than boxer briefs; may not prevent chafing on longer walks.
Boxer Briefs
The longest-legged option in the fitted category. Boxer briefs extend to mid-thigh and deliver the most coverage with a contoured fit. Many men find them the most versatile everyday cut: enough leg coverage to prevent thigh chafe, enough support to feel structured. They're the preferred choice for longer days, travel or anything that involves significant movement.
Pros: prevents thigh chafe; most coverage of any fitted cut; works across gym, office and travel. Cons: more fabric can feel warm in very hot weather; shorter torsos may find the leg sits lower than expected.
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A thong has a full front panel for support and a minimal back that leaves the seat uncovered. The practical case is simple: no visible underwear lines under fitted trousers, chinos or swimwear. Men who find a thong with proper front support often stop reaching for anything else when wearing slim-cut clothing.
Pros: zero visible lines under fitted clothing; less fabric means less heat buildup at the back. Cons: takes an adjustment period if you're used to full back coverage; not suited to high-intensity sport.Jockstraps
Originally a sports garment, the jockstrap has an open back with two straps framing each side of the seat. The waistband and front pouch provide firm support. It's the preferred cut for high-intensity activity and a consistent favourite at the gym and for weekend events where form and function both matter.
Pros: firm front support; no excess back fabric; purpose-built for physical activity. Cons: open back is not for everyone; not suited to casual everyday wear under most trousers.For how fabric affects each of these cuts, the guide to best fabrics for men's underwear is worth reading alongside this one.
What Material Is Best for Men's Underwear?
The best material depends on your priorities. Bamboo viscose leads for breathability and softness. Cotton is the reliable everyday standard. Modal is silky and light. Merino wool excels in temperature regulation. Synthetic fabrics like nylon and polyester perform in high-sweat scenarios but fall short on breathability.
Here's a direct comparison across the six most common fabrics:
| Fabric | Feel | Breathability | Moisture-wicking | Odour resistance | Durability | Best for |
|---|---|---|---|---|---|---|
| Bamboo viscose | Exceptionally soft, silky | High | High | High | High (with gentle care) | All-day wear, warm climates, sensitive skin |
| Cotton | Soft, familiar | Moderate | Low-moderate | Moderate | High | Casual everyday wear |
| Modal | Silky, lightweight | Moderate-high | Moderate | Moderate | Moderate | Comfort-focused everyday wear |
| Merino wool | Slightly textured, warm | High | High | Very high | Moderate | Travel, cold climates, multi-day wear |
| Nylon | Smooth, thin | Low-moderate | High | Low | High | Athletic performance |
| Polyester | Variable | Low | High | Low | Very high | Budget athletic wear |
Bamboo Viscose
Bamboo viscose is made by processing bamboo pulp into a fibre and weaving it into fabric. The result is designed to wick moisture away from the skin, allow air circulation and resist odour buildup throughout the day. It's markedly softer than most cotton weaves at comparable weight, which is why men who switch often notice a meaningful difference. TBô builds its entire range from 95% bamboo viscose with 5% spandex for stretch and shape retention. For a head-to-head breakdown, see organic cotton vs bamboo underwear.
Pros of bamboo viscose: exceptionally soft against skin; moisture-wicking and breathable; odour-resistant through long days; holds shape with gentle care. Cons of bamboo viscose: costs more upfront than basic cotton multipacks; requires gentle care to maximise lifespan; the viscose production process is more chemically intensive than growing organic cotton (more on that in the sustainability section below).
Cotton
Cotton remains the benchmark that most men grew up with. It's widely available, durable and comfortable in moderate temperatures. The limitation is moisture management: cotton absorbs sweat rather than wicking it, which can feel heavy and damp in warm weather or after exercise.
Pros of cotton: widely available at every price point; durable through high-heat washing; familiar feel for most men. Cons of cotton: holds moisture against the skin; heavier and slower to dry than bamboo viscose or modal; less soft at comparable weights.For cool days and low-activity situations, it does the job. For anything warmer or more physical, bamboo viscose or merino handle the conditions better.
Modal
Modal is a semi-synthetic fabric derived from beech wood pulp. It feels lighter and silkier than standard cotton and holds its shape well through repeated washing. Breathability sits between cotton and bamboo viscose.
Pros of modal: silky feel; lighter than cotton; holds colour well. Cons of modal: can pill more quickly than bamboo viscose under regular use; breathability doesn't quite match bamboo viscose in warm conditions.Merino Wool
Merino is the travel fabric. Fine enough to feel soft against skin, it regulates temperature in both directions and resists odour better than any plant-based fabric. The trade-off is that it needs more careful washing and costs more per pair.
Pros of merino: outstanding odour resistance; temperature-regulating; works in cold and warm conditions. Cons of merino: higher price point; requires careful washing; slightly textured feel that takes adjustment for some men.Nylon and Polyester
Synthetics wick moisture fast and dry quickly, which makes them useful for sport. The drawback is that neither breathes well, and both can retain odour over time. They suit a specific use case (high-intensity training) rather than all-day wear.
Pros: durable; dries fast; effective moisture transport during exercise. Cons: poor breathability for everyday wear; tendency to retain odour with repeated use.Many buyers find modal ideal for loungewear or low-impact days. For more on how fabric affects comfort and skin health, the healthiest underwear choices for men covers the full picture.
How Should Men's Underwear Fit? Sizing Without the Guesswork
Men's underwear fits correctly when it sits flat against the body without digging, bunching or leaving red marks. The pouch should support without compressing, the waistband should lie flat, and leg openings should be snug but not tight enough to leave creases in the skin.
The single most common sizing mistake is buying underwear to your trouser waist size. Trouser sizing varies wildly by brand and cut. Your natural waist measurement, taken with a soft tape measure around the narrowest part of your torso, is the reliable number.
TBô's size range runs from XS to XXL with the following waist measurements:
| Size | Waist (inches) |
|---|---|
| XS | 25-28 in |
| S | 28-31 in |
| M | 31-33 in |
| L | 33-36 in |
| XL | 36-40 in |
| XXL | 40-44 in |
If you're between sizes, most buyers report that sizing up gives a more comfortable result, particularly around the waistband.
The ManShaped Pouch
TBô's ManShaped contour pouch is built to follow the body's natural shape rather than pressing flat against it. Everything sits forward and away from the inner thigh, reducing friction and keeping the fit stable throughout the day. Buyers report significantly less adjustment needed compared to flat-fronted cuts.
The Adaptive Waistband
The adaptive waistband moves with the body without rolling down or leaving a visible ridge beneath clothing. You'll notice it stays flat against the skin whether you're sitting at a desk, at the gym or out for the evening. If you've ever spent a meeting quietly tugging your waistband back up, you'll notice the difference immediately.
For more detail on waistband construction and what prevents rolling, the guide to no-roll waistband underwear for men is a practical next read.
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Which Cut for Which Occasion? A Practical Breakdown
The right cut depends on what you're wearing over it and what you're doing in it. Briefs under tailored trousers, boxer briefs on a long flight, trunks at the beach: each scenario has a clear answer once you think through coverage, support and visibility.
Here are five real situations that make the choice obvious.
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You want something that looks intentional, fits cleanly and feels good. Trunks or briefs in a solid, confident colour hit that note without trying too hard. Buyers who invest in quality here report that the confidence carries, which may or may not be a coincidence.
The Gym
Jockstraps remain the most functional option for high-intensity training: maximum front support, no excess fabric at the back and nothing to bunch under compression shorts. Boxer briefs work well for lower-intensity sessions where you want full thigh coverage to prevent chafe.
Beach or Pool Holiday
Trunks are the clean, versatile choice for a beach trip. They sit neatly under swimwear and double as an easy change after a swim. Many men find that packing a few pairs of trunks covers both pool days and evenings out, especially if fabric dries quickly. The beach vacation packing list covers this in more detail.
Pride Weekend
Pride is the one occasion where your underwear is likely to be seen as part of the outfit, so cut and colour both matter. Briefs in a bold colour or a jockstrap for the beach stage are popular choices. This is a good argument for keeping a couple of pairs specifically for occasions when the waistband is part of the look. Underwear as outerwear: perfectly valid, entirely practical.
Long Travel Days
Boxer briefs are built for hours in a seat. The extra leg length prevents thigh friction against the seat fabric, and a moisture-wicking bamboo viscose pair handles the body heat that builds up on long flights better than cotton. Buyers specifically cite bamboo viscose boxer briefs as their go-to for long-haul travel. The men's gym bag essentials guide covers packing smart for any trip.
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Why Men's Underwear Quality Pays Off Over Time
Three cuts account for most of what men reach for day to day: briefs, trunks and boxer briefs. TBô's versions are co-created with the TBô Tribe, a community of 400,000+ men who give feedback from design through to the finished pair. The fabric is 95% bamboo viscose throughout, rated 4.4 stars from 8,000+ verified reviews. Free US shipping on orders over $75, and every first pair comes with a guarantee: if it doesn't work for you, TBô replaces it with a cut you prefer or refunds you.
The cost-per-wear case is worth spelling out plainly. Two quality pairs worn three times a week and lasting three years work out to roughly $0.17 per wear. A budget six-pack that loses its shape inside twelve months has to be replaced annually; by year three you've spent more and worn worse. Customers tell TBô they're still wearing the same pairs three to five years after purchase. That's what the community consistently reports back.
Quality also compounds in less obvious ways. A waistband that doesn't roll means one fewer adjustment you make every hour. Flatlock seaming means no ridge chafing through a long day. Fabric that holds its softness after fifty washes means Monday feels the same as day one. Those details add up.
How to Make Men's Underwear Last: Care and Storage
Men's underwear lasts longest when washed cold on a gentle cycle, never bleached and hung to dry rather than tumble dried. Those three rules make a measurable difference to how long the fabric holds its shape and softness.
For bamboo viscose specifically, here are the steps:
Step 1: Wash cold. Hot water breaks down bamboo viscose fibres faster than anything else. Use a gentle cycle, 30°C or below. Step 2: Skip the bleach. Any chlorine-based product degrades the fabric quickly. Mild detergent is all you need. Step 3: Hang to dry. Tumble drying is harder on bamboo viscose than on cotton. It's fine when you're short of time, but a clotheshorse or line adds real life to the pair. Avoid direct high heat. Step 4: Skip the iron. Bamboo viscose relaxes on its own as it dries. You don't need to iron it, and high heat can damage the spandex content that gives the fabric its stretch.Customers tell TBô that many pairs last three to five years with consistent gentle care. That reflects what regular buyers report back.
Folding to Save Space and Protect Fabric
Two methods work well for drawer storage.
The Ranger Roll. Lay the pair flat, fold the waistband back about two inches, roll the body of the underwear tightly from the crotch up to the waistband, then tuck the roll into the folded waistband cuff. You get a compact cylinder that stands upright in a drawer and doesn't unravel. The Flat Tri-Fold. Fold in thirds horizontally, then fold in half vertically. Flat and stackable. Works well for tight drawers or packing in a bag.Neither method stresses the fabric at the elasticated points, which is where creasing tends to cause premature wear. For more on construction quality and why stitch type matters, the guide to flatlock stitch construction explains what to look for.
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What Is the Best Quality Men's Underwear? What to Look For Online
The best quality men's underwear combines fabric that performs across temperature and activity, construction that doesn't degrade quickly at the seams, a waistband that stays flat and a pouch that fits the body rather than fighting it. Buyers searching online consistently narrow it down to those four criteria.
Common Mistakes When Buying Men's Underwear
Most underwear disappointments trace back to a handful of avoidable errors. Knowing them ahead of time saves you a drawer full of pairs you never reach for.
Buying to trouser size, not waist measurement. Trouser sizing varies by brand, cut and country. Your natural waist measurement (taken with a soft tape measure at the narrowest point of your torso) is the only reliable number. Men who measure first and buy second report significantly better fit from the first pair. Assuming all fabrics behave the same. A cotton brief and a bamboo viscose brief in the same cut will feel meaningfully different by hour six of a warm day. Fabric choice matters most in heat and during physical activity. Ignoring the seam construction. Flatlock seaming lies flat against the skin and doesn't create a ridge. Raised seams cause chafing that only shows up after a few hours of wear. Check the product description for flatlock or flatseam construction before buying. The guide to flatlock stitch construction explains exactly what to look for. Treating cheap multipacks as a cost saving. The cost-per-wear calculation usually works against the budget option within the first year. Replace once annually and by year three you've spent more than you would have on a smaller set of quality pairs. Skipping the return policy check. Fit is personal. Buying from a brand that offers a first-pair guarantee removes the primary risk of buying online. TBô replaces your first pair with a different cut or refunds you if the fit isn't right; you simply return the pair that didn't work. Overlooking the waistband construction. A waistband that rolls down by midday or leaves a visible ridge under a fitted shirt is a daily frustration. Look for adaptive or no-roll waistband construction. The guide to no-roll waistband underwear for men covers what to look for in the spec.A Practical Buying Framework
Fabric first. Check the composition label. Bamboo viscose, modal and quality cotton all have a track record. Generic polyester blends may feel fine initially but tend to pill and lose shape faster. Construction quality. Look for flatlock seaming and reinforced waistband attachment. Seam failure is the most common reason underwear is discarded early. Verified reviews. Third-party verified reviews across a reasonable sample tell you more than brand copy. Pay particular attention to comments about waistband longevity and how the fit holds up after repeated washing. Return or guarantee policy. A brand confident enough to offer a first-pair guarantee is signalling something about the product.On "Underwear for Gay Men"
The phrase turns up frequently in search, but there's no separate category. Any cut is available to any man. The more useful question is: what fits your body, suits your occasion and holds up to your lifestyle? Cut and fabric answer that. The TBô range is co-created by a community of men with exactly that range of needs, and their feedback shapes every design decision.
Buyers who move away from fast-fashion basics consistently find that cost-per-wear on a quality pair outperforms a cheap multipack. For the broader case, see alternatives to fast-fashion basics.
Shoppers who prefer to browse locally will find basics at major retailers including Walmart, Target and department stores. Bamboo viscose options and specialist fits are more consistently available online, where brand-direct buying gives you access to the full size range and return guarantees that aren't available in-store. For buying quality second-hand, the buying second-hand clothing online guide covers reputable platforms worth knowing.
What Is the Front Hole in Men's Underwear For?
The front hole in men's underwear, usually called a fly, is designed to provide access without removing the underwear. Most flies are either a standard vertical opening or a horizontal slit at the front panel. In practice, many men report never using the fly at all, treating it as a structural element rather than a functional one.
Functional Fly
A functional fly has an opening wide enough and structured enough to actually use. This typically means overlapping fabric panels rather than a simple slit. They're found on boxers and some boxer briefs. Whether you use it comes down to personal habit.
Decorative or Non-Functional Fly
A large proportion of underwear labelled as having a fly has a non-functional version: a single layer of fabric with a short seam that creates the visual shape but no actual opening. It's there for design continuity with the traditional look, not for practical access.
The Pouched Alternative
Many modern cuts, including briefs, trunks and boxer briefs with a ManShaped pouch, skip the fly entirely. The pouch itself provides the forward shape and anatomical support that a flat-front with fly was originally trying to achieve. Buyers often find the pouch construction more comfortable and better-fitting than the fly alternative, particularly in fitted cuts where a fly seam can create visible bulk.
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Sustainable Men's Underwear: Why Fabric Choice Matters Beyond the Drawer
Sustainable men's underwear is primarily defined by fabric sourcing, production impact and how long the garment actually lasts. A pair you wear for three to five years has a lower lifetime environmental cost than three cheap pairs replaced every eighteen months, regardless of what they're made from.
Bamboo viscose sits in an interesting position in the sustainability conversation. Bamboo as a plant grows quickly, requires minimal water compared to conventional cotton and doesn't need pesticides to thrive. Those are genuine advantages at the source. The conversion from raw plant to wearable fabric involves a chemical process (the viscose process) that is more intensive than growing and ginning organic cotton. Honest brands acknowledge this trade-off rather than leading entirely on the bamboo plant's natural properties.
Conventional cotton, for comparison, is one of the more resource-intensive crops in global agriculture: significant water use and pesticide application in non-organic growing are well-documented concerns. The Water Footprint Network has published research showing conventional cotton requires substantially more water per kilogram of fibre than most other crops. Organic cotton addresses the pesticide issue but still requires substantial water. Neither fabric is a perfect answer.
The relevant question for most buyers is practical: which fabric, in the form you'll actually buy and care for, lasts longest and suits your body best?
Where bamboo viscose builds its most credible sustainability case is in longevity. The fabric is designed to hold its softness and shape through years of washing, which means fewer replacements. Customers tell TBô they're still wearing the same pairs three to five years after purchase. That's a meaningful difference in how many garments you cycle through over a decade.
The other sustainability lever is buying less overall. A smaller drawer of well-made pairs you actually wear beats a larger one of impulse purchases you rotate past. Choosing a brand with a community-led design process like TBô also means fewer experimental designs that don't connect and get discarded before their time.
For more on what makes underwear genuinely sustainable, the sustainable men's underwear guide goes deeper on certifications and production. For the broader case against disposable fashion, buying clothes with purpose is worth reading.
Frequently Asked Questions About Men's Underwear
What is the purpose of the front hole in men's underwear?The front hole, called a fly, is designed to allow access without removing the underwear. It comes in two versions: a functional fly with overlapping panels that actually opens, and a non-functional version stitched shut for traditional styling. Many men never use the fly and prefer a smooth pouch-front construction instead.
What are the different types of men's underwear?Men's underwear comes in five main cuts: briefs (high waist, high leg), trunks (low waist, square short leg), boxer briefs (low waist, extended leg to mid-thigh), thongs (full front, minimal back) and jockstraps (full front pouch, open back with support straps). Each cut suits different activities, body types and clothing styles.
What material is best for men's underwear?Bamboo viscose is the best all-round material for most men: designed to wick moisture, resist odour buildup and stay soft after repeated washing. Cotton is a reliable everyday choice in cooler conditions. Merino wool leads for multi-day travel and temperature regulation. The healthiest underwear for men breaks down how fabric choice affects comfort and skin health.
Is bamboo viscose worth the higher price compared to cotton?For most men, yes. The upfront cost is higher, but bamboo viscose outperforms cotton in breathability, moisture management and softness. Men who track their underwear lifespan report that quality bamboo viscose pairs last three to five years with proper care, which brings the cost-per-wear close to or below that of cheap cotton multipacks replaced annually.
How should men's underwear be washed to make it last?Machine wash cold on a gentle cycle, no bleach, and hang to dry where possible. Tumble drying is fine when you're short of time, but it's harder on bamboo viscose fibres than air drying and shortens the lifespan of the fabric over repeated cycles. Skip the iron; bamboo viscose relaxes naturally as it dries.
How do I know if my underwear fits correctly?Well-fitted underwear sits flat against the body without digging in, leaving red marks or requiring adjustment throughout the day. The pouch should support without compressing. The waistband should lie flat at the hip. If either is happening, check your waist measurement against the brand's size guide; trouser sizing and underwear sizing are not the same number.
Where can men find underwear with full size ranges and return guarantees?Specialist cuts, extended sizes and first-pair guarantees are more reliably available direct from the brand online than in-store. TBô runs XS to XXL (25-44in waist) and replaces your first pair with a different cut or refunds you if the fit isn't right. Major retailers carry basics, but bamboo viscose options and contour-pouch fits are rarely stocked in full.
The Bottom Line on Men's Underwear
The right pair gets three things right: cut that suits the occasion, fabric that performs for your climate and lifestyle, and fit built around your actual waist measurement. Get those three right and the rest follows: comfort, longevity, confidence.
For everyday wear, bamboo viscose in a brief, trunk or boxer brief covers most situations. For active use, a jockstrap or boxer brief in a moisture-wicking fabric holds up better. For occasions where your underwear will be seen, trunks or briefs in a confident colour do the job without overcomplicating it.
Quality matters more than most men expect before they try it. Customers regularly report wearing the same pairs for years when they invest in well-made underwear and care for it properly. The cost-per-wear calculation shifts quickly in your favour. For a detailed look at how bamboo viscose compares to organic cotton across those years, comparing bamboo viscose and organic cotton is the right next step.
When you're ready to find the cut that actually fits, you can browse the full cut range at TBô. Every first pair comes with a guarantee: if the cut isn't right for you, TBô replaces it with one that is or refunds you. There's no risk in finding out what fits.
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