How It Works

Most sweat-proof undershirts protect one spot: the armpit. That's half the problem.

Anyone who's sat through a long meeting or a summer commute knows the other half—the patch that spreads across your upper back, right where you can't see it but everyone behind you can.

LayerOne was built to stop both.

The Dual-zone Problem: Solved

Underarm. A barrier sits between you and your shirt, absorbing sweat before it reaches the fabric on top.

Upper-back. The same protection runs across the back panel, the area most sweat-proof brands skip entirely, because it's harder to engineer and most people don't think about it until it's too late.

How Does It Work?

Just put it on in the morning the same way you'd put on any undershirt. No routine to learn, nothing else to remember.

Then you walk into your meetings without the bathroom check. Take your jacket off when it's hot. Date night, and you put your arm around your girl. 

There's no dark patch spreading under your arm. No damp circle pressed into the back of your chair when you stand up.

You get home and your outer shirt still looks exactly like it did when you left the house. Even better—you haven't even thought about it all day.

The result

99% of customers reported fewer visible sweat marks, based on a survey 30 days after purchase.

Try it and see for yourself. If it doesn't work the way we say, no sweat: you're covered by our 30-Day Money-Back Guarantee.