Social Citizen sweat-proof T-Shirts help with excessive armpit sweating through the use of our hidden 3-layer underarm pad that prevent sweat stains from being visible. If you're trying to figure out how to stop underarm sweat stains, this is the most natural and fashionable solution. Hyperhidrosis, also known as excessive sweating is tough to deal with and some hyperhidrosis treatments can be harsh. Feel confident again in our fashionable sweat proof t-shirts.