The Most Comfortable Underwear (For Men, Women and Everyone)

The most comfortable underwear is a soft, stretchy micro-modal pair that fits your body without squeezing it, and Culprit Underwear's 95% micro-modal, 5% spandex blend is our pick. It is plant-based, smooth against skin, and made in fits for men, women and everyone in between.

What makes Culprit our pick for most comfortable underwear?

The fabric is the verdict. Culprit pairs are 95% sustainably made micro-modal and 5% spandex. Micro-modal is a plant-based fabric made from beech wood pulp, and it is a type of rayon. That gives you a smooth feel, stretch that moves with you and a pair you forget you are wearing. Per Wikipedia's entry on modal, the fiber is smooth, resists shrinkage and absorbs more than cotton by volume. Over 14,000 customers have left reviews, and your first pair on a first order comes with a 100-day money-back guarantee.

Which comfortable underwear is right for men?

Culprit boxer briefs have a left-side fly, a mid-rise and a 5 3/4" inseam in size M. Prefer less leg? Trunks are shorter. Our full breakdown covers heat, sleep, big guys and the gym on the most comfortable underwear for men page. Shop boxer briefs or trunks.

Which comfortable underwear is right for women?

LadyBoxers are boyshorts with a mid-high rise and a 5 3/4" inseam. For more thigh coverage, Long LadyBoxers add inseam length and coverage. The most comfortable underwear for women page covers thongs, sleep, heat and wireless bras. Shop LadyBoxers, thongs or bras.

Is there comfortable underwear that is gender-neutral?

Yes, fit matters more than the label. Pick the cut you like, then size by waist using our size guide. Men's and women's prints match, so you can grab the same funny limited-edition design in both cuts. See the matching couples underwear collection. Your underwear drawer does not need a dress code.

How does micro-modal compare to cotton, polyester and bamboo?

Micro-modal wins on softness and stretch, while polyester wins on heavy-duty sweat wicking. Here is the honest version, with general tendencies for each fabric:

Fabric	Feel	Breathability	Stretch and shape	Best for
Micro-modal (Culprit)	Very smooth, silky	Breathable	Stretchy with spandex, resists shrinkage	All-day wear, sleep, everyday life
Cotton	Varies by quality	Generally breathable	Tends to shrink more than modal	Basic everyday pairs
Polyester	Tends to feel slick	Generally wicks sweat well	Generally durable	Heavy training and sport
Bamboo (viscose)	Generally soft	Generally breathable	Stretch varies by blend	Soft everyday pairs

Bamboo viscose is also a rayon, so it can feel similar to micro-modal. Want the deep dive? Read micro-modal vs cotton underwear. One honest limitation: Culprit is a lifestyle pair, so if you train hard every day, a performance polyester pair may suit that job better.

Frequently asked questions

What is the most comfortable underwear fabric?

For softness and stretch, micro-modal blended with a little spandex is hard to beat. It feels smooth on skin, moves with you and resists shrinkage. Culprit uses 95% micro-modal and 5% spandex. Polyester can suit hard training better, and cotton works for basic pairs.

Is micro-modal better than cotton?

For comfort, many people find micro-modal smoother and stretchier than cotton, and it resists shrinkage. Cotton is breathable and familiar, so it still has fans. Our guide to micro-modal vs cotton underwear lays out the tradeoffs so you can choose.

How do I find my size?

Size by waist. Culprit sizes run S (26 to 28 inches), M (29 to 31), L (32 to 34), XL (35 to 37), XXL (37 to 41) and 3XL (42 to 46). Booty Shorts run small, so size up. The size guide has the full details.

What if I do not like them?

Your first pair on a first order comes with a 100-day money-back guarantee. Worn or washed pairs cannot be returned, so try them on over something first. Free U.S. shipping applies on orders over $99.

How should I wash comfortable underwear?

Machine wash cold on delicate, then tumble dry low or air dry. Gentle care helps stretchy fabrics keep their shape. When pairs finally wear out, our guide on how often to replace underwear can help you decide.

Not sure where to start? Browse boxer briefs, LadyBoxers, check the size guide, or read how often to replace underwear. Most single pairs run $13 to $35.