Under Armour Men's Tactical 6&rdquo; Training 100% Polyester Imported Loose: Fuller cut for complete comfort 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 smooth fabric has crepe-like lining for breathability and superior comfort Advanced Moisture Transport System to keep you cool, dry, and comfortable Secure internal key pocket so you can run without bulk and without worry