Boxer Briefs vs Boxers vs Trunks: What's the Difference?

Editor's note: This guide was written and reviewed by the comfort experts at Underneath Magazine.

Boxer Briefs vs Boxers vs Trunks: The Complete Guide

Simon Zycurbi

Updated: November 11, 2025

You've been putting on underwear every morning for 20, 30, or 40 years. And yet, odds are you're still wearing the wrong style, the one your mom used to buy, or whatever you grabbed in a 5-pack without thinking twice.

The result? You know it by heart. Fabric riding up your thigh that you have to adjust discreetly in the middle of a meeting. A waistband digging into your waist right after lunch. Chafing between your thighs by step 8,000 of the day.

This guide compares the three main styles, boxer briefs, boxers, and trunks, so you know exactly which one fits your body and your days. And at the end, we'll reveal the one factor almost every man overlooks when buying.

Which Style Should You Choose?

The Quick Comparison

	Boxers	Boxers Briefs	Trunks
Fit	Loose and airy	Fitted to the body	Very fitted, square cut
Inseam length	Mid-thigh	Mid-thigh	Short (upper thigh)
Support	Low	High	High
Under fitted pants	Bunches up	Invisible	Invisible
Best for	Sleep, lounging	Everyday, work, gym	Slim jeans, shorts, summer

Most men are still wearing cotton underwear out of habit.

Because it’s what they’ve always known.
Because it’s cheaper. Because “that’s just what you wear.

The problem is that cotton has a major flaw when worn all day: it traps moisture, sticks to your skin, and creates discomfort.

Silk does the opposite.

Here’s a direct, no-BS comparison between silk and cotton for men’s underwear.

Quick verdict: On real all-day comfort, staying cool and dry, and reducing irritation, silk wins clearly. Cotton only makes sense if you prioritize the lowest price and easiest laundry.

What Are Boxer Briefs? (The Versatile Choice)

Boxer briefs were born in the '90s from one simple idea: combine the length of boxers with the support of briefs. Thirty years later, they're the best-selling underwear style in the world.

The leg extends to mid-thigh, creating a fabric barrier between your thighs. That one detail eliminates the #1 problem for active men: chafing. Walk 10,000 steps in boxers on a summer day, then do it again in boxer briefs, you'll feel the difference within the first mile.

The fitted cut hugs your body without squeezing it, and the contoured front pouch keeps everything in place, whether you're sitting at a desk for 8 hours or in the middle of a workout.

Pros: All-day support, zero chafing between the thighs, invisible under any pants.

Cons: Can run hot if the fabric is low quality (more on that in a minute).

Who are they for? Pretty much everyone. This is the default style for the modern man, especially if you're on your feet a lot or have strong thighs.

What Are Boxers? (Total Freedom)

Boxers are the classic, the style your grandfather wore. Loose, airy, with a gathered waistband and a front fly, they're basically a pair of mini shorts that barely touch your skin.

Their one and only promise: maximum airflow. Nothing squeezes, nothing compresses, nothing sticks.

Pros: Total freedom, extremely breathable, that "wearing nothing" feeling at night.

Cons: Zero support. The fabric bunches up, shows visible lines under pants, and rides up when you cross your legs.

Who are they for? The guy who wants comfort for sleeping and lazy Sundays. Great for lounging, wrong for an active day.

What Are Trunks? (The Modern Style)

Trunks are boxer briefs' little brother: same fitted cut, same front support, but with a noticeably shorter leg that stops at the upper thigh.

Their advantage is both visual and practical: zero extra fabric on the thigh. Under slim jeans or short shorts, they're the only style that stays completely invisible.

Pros: Modern look, ideal under fitted clothes, never peeks out under summer shorts.

Cons: Less fabric on the thigh = can ride up on men with muscular thighs. Less protection against chafing.

Who are they for? Slim to athletic builds, slim-jeans wearers, and hot summer days.

Already know which style you need?

No need to keep reading if everyday comfort is what you're after. 93% of our customers choose boxer briefs for their daily grind.

Shop the Ares Boxer Briefs Collection

Which Style Is Right for You?

Stop picking underwear at random. Ask yourself one question: what does your day look like?

- Office in the morning + gym in the evening? → Boxer briefs. They hold up all day without ever reminding you they're there. The best underwear is the kind you forget.

- Slim jeans or summer shorts on the agenda? → Trunks. The short cut eliminates fabric lines on your thigh.

- Pajama Sunday, naps, and the couch? → Boxers. Nothing beats them for pure downtime. Still not sure?

- Go with boxer briefs. It's the style that becomes the daily pick for the vast majority of men who try all three.

The One Factor Almost Everyone Overlooks: The Fabric

Here's the truth the multipacks at the store will never tell you: you can pick the perfect style... and still hate your underwear.

Try this test tonight. Grab your favorite pair and read the label. You'll almost certainly find one of these two materials:

Regular cotton: It absorbs moisture... and keeps it. By 3 PM on a summer day, your cotton boxer briefs have soaked up the morning's sweat and are holding it against your skin. That trapped moisture is what causes irritation, redness, and that clammy feeling. Polyester: It's woven plastic. It blocks airflow, traps heat, and after about twenty washes it gives out. The waistband warps, the leg gapes, and the pair you loved is shapeless. The cut defines the structure. The fabric defines the experience.

So if cotton traps moisture and synthetics smother your skin, what's left? A natural fiber humans have used for 5,000 years, that almost nobody thinks to wear where it matters most.

Our Recommendation: Silk Boxer Briefs

At Ares, we started from a simple observation: the best cut in the world (the boxer brief) was consistently being made from the worst materials. So we built it in the highest-performing fabric for skin there is: silk.

1. It regulates temperature: Silk releases heat when it's hot and insulates when it's cold. Your skin stays at the right temperature.

2. It stays dry: Silk can absorb a significant share of its own weight in moisture without ever feeling wet — while cotton saturates and clings. No more end-of-day clamminess.

3. Zero irritation: Under a microscope, silk fiber is perfectly smooth. Cotton has rough scales. Zero friction = zero redness, even after 15,000 steps.

4. The Ares standard; Our seams are reinforced so your underwear keeps its shape, wash after wash. The result: the feeling of wearing nothing... with perfect support.

The Absolute Comfort Guarantee

Try it for 30 days: If it doesn't become the most comfortable pair in your drawer, send it back.
Full refund, no questions asked.

Fast shipping: Ships within 7-10 days across the World.

Built to last: A sturdy silk made for everyday wear,
not just special occasions.

LIMITED TIME OFFER

Make the switch to silk.

Try Ares Silk Boxers. If you don’t feel the difference, send them back.

Try Ares and Feel the Difference

Backed by our 100% comfort guarantee.

Frequently Asked Questions

Find answers to common questions about our product

Are boxer briefs or boxers better for your health?

It comes down to the fabric, not the cut. Boxer briefs in a breathable, smooth material reduce chafing and keep skin dry. Loose boxers in cheap synthetics will trap heat and moisture. The deciding factor is the material.

Do boxer briefs ride up?

Boxer briefs ride up when they're too short or the fabric has stretched out. Thanks to a carefully engineered inseam and the natural hold of its silk, the Ares boxer brief stays perfectly in place without squeezing. It's mostly trunks, being shorter, that can ride up on very muscular thighs.

Is silk practical for everyday wear or working out?

Yes. Our 23-momme silk is dense and durable, nothing like the delicate silk in nightwear. It wicks sweat faster than cotton and eliminates friction. Ideal for active days.

How do you care for silk boxer briefs?

It's simple: machine wash at 85°F / 30°C on a delicate cycle, ideally in a mesh laundry bag, then air dry. Our tests confirm the fabric holds its shape even after 1001 washes.

Q: Why do they cost more than a multipack of cotton?

It's a cost-per-wear calculation. Cheap cotton stretches out, pills, and needs replacing within months. Ares boxer briefs keep their structure and softness for years. Divide the price by the number of times you wear them,the math flips in your favor, with the comfort as a bonus.

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