Under Armour Youth Tech Big Logo 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: XS ,S,M,L,XL Colors: Black/Red,Black/Scarlet,Black/Silver,Black/Silver/Blue,Black/White,Black/Yellow/GLO,Blue/Black,Blue/Gray,Blue/Orange,Carbon Heather Gray/Black,Carbon Heather Gray/Yellow/Silver,Gray/Orange,Gray/Yellow,Green/Green,Green/Silver/Black,Green/White,HTH/Black,HTH/Blue/Blue,HTH/Pink,Maroon/White,Navy/Scarlet,Navy/Silver,Navy/White,Orange/Gray,Orange/Silver,Pink/Black,Purple/Carbon Heather Gray/Black,Purple/White,Red/Black,Royal Blue/White/Scarlet,Scarlet/Black,Scarlet/HTH/Gray,White/Black,Yellow/Black,Yellow/Gray,Yellow/Silver/GLO 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.