Under Armour Men's Tactical HeatGear Compression V-Neck 100% Polyester Imported Compression: Ultra-tight, second skin fit WARNING! This product will melt when exposed to extreme heat or open flames, posing a risk of serious injury where melted product comes into contact with skin! Lightweight, field-tested HeatGear fabric delivers soft, but sturdy next-to-skin comfort 4-way stretch fconstruction improves mobility and accelerates dry time, while maintaining shape Our signature Moisture Transport System keeps you cool, dry, and light on your feet