Under Armour Men's Tech 3/4 Sleeve Shirt Under Armour Tech fabric has an ultrasoft, more natural feel for unrivaled comfort. Moisture Transport System wicks sweat away from the body. Antiodor technology prevents the growth of odor causing microbes. 100 polyester. Sizes: S,M,L,XL,XXL,XXXL Colors: Black/Gray,Blue/Gray,Dark Green,Gray/Black,Gray/Blue,Gray/Green,Gray/Scarlet,Navy/Gray,Navy/White,Steel Gray/Gray HeatGear is engineered with a microfiber blend fabric featuring the signature Moisture Transport System and reliable compression. It's designed to fit tight to your skin, under your outerwear.