Under Armour Boys' UA PIP HeatGear&reg; Armour Skull Cap One Size Fits All Tropic Pink Polyester/Elastane HeatGear fabric is ultra-soft & smooth for extreme comfort with very little weight Material wicks sweat & dries really fast | Smooth, chafe-free flatlock seam construction Jacquarded band detail 4-way stretch fabrication allows greater mobility & maintains shape Ultra-soft, smooth fabric provides extreme comfort with very little weight Anti-odor technology prevents the growth of odor-causing microbes | Polyester/Elastane