Sweat Proof Undershirt Where design and fashion meet sweat proof innovation to keep your underarms free from visible sweat stains. This combination of high-end aesthetic and sweat-proof engineering is the key to the undershirt's sweat management ability, giving you protection and confidence where it’s needed most. Combining reinforced absorbent layers with a sweat-proof barrier the undershirt guarantees your outerwear stays absolutely dry. You have the choice of Swiss Supima cotton, considered by many to be the highest quality cotton in the world or Organic cotton, whereby you'll be supporting the planet as we journey toward a sustainable future. With either choice your skin will thank you. Enjoy the freedom of styling it dry.