Ribbed acrylic knit exterior fabric delivers all-day comfort & warmth|Material wicks sweat & dries really fast|Textured waffle knit interior fabric traps heat for extra warmth|ColdGear Infrared technology uses a soft, thermo-conductive coating to absorb & retain your body heat - Style #: 1365921|Extended woven clip logo|Exterior: 100% Acrylic|Interior: 100% Polyester|Imported - Machine wash cold with like colors|Use only non-chlorine bleach when needed|Tumble dry low|Do not iron|Do not use softeners|Do not dry clean