Anti-sweat underwear: what actually keeps you dry

Short answer: the underwear that keeps you dry does not absorb sweat, it wicks it. "Anti-sweat" underwear works by moving moisture off your skin and drying fast, rather than soaking it up like cotton and holding it against you. If your goal is to stay dry through a workout or a hot day, you want a breathable moisture-wicking knit with a cotton-lined gusset, not an all-cotton pair. Here is why, and what to look for.

Wicking vs absorbing: the difference that matters

Cotton absorbs. It draws sweat in and stores it, which feels fine for the first ten minutes and then leaves you sitting in a damp, warm pair for hours. A performance knit wicks: it pulls moisture to the surface and lets it evaporate, so the fabric dries and you stay dry. For staying dry, wicking beats absorbing every time. This is the single most misunderstood thing about "anti-sweat" underwear.

What actually keeps you dry?

• A breathable, moisture-wicking body that moves sweat and dries fast.
• A cotton-lined gusset for the sensitive skin that needs softness and breathability.
• Bonded flat edges so nothing chafes when you are warm and damp.
• The right fit, because a pair that digs traps moisture in the crease.

That combination is what genuinely reduces the damp, sticky feeling, whatever the label on the packet says.

Is cotton underwear better or worse for sweat?

For staying dry during activity, worse. Cotton is soft and breathable, which is why it is the right choice for the gusset, but soaking-wet cotton stays wet against you and can chafe. For the body of the garment, a wicking knit keeps you drier. The best design uses both, cotton where it touches you most and a breathable knit for the rest. We go deeper on this in cotton vs synthetic underwear.

The honest take

No underwear stops you sweating, and "anti-sweat" is really shorthand for "keeps you dry." The pair that does it wicks instead of absorbs, breathes, dries fast and has a cotton-lined gusset. That is exactly how we built the Anywhere G, so you stay dry through the gym, the commute and the 35-degree day, from $21.90 a pair in packs.