Lenz Products Unisex Set Lithium Pack rcB 1200 + Heat Sock 1.0 49% Polyester/29% polyamid/10% polyprpylen/ 7%merino/ 5% elasthan Imported Bluetooth remote control with your Smart/I-Phone Warm feet's with Lithium battery powered Heating socks For all winter Sports and Outdoor activities 3 heat settings with up to 14 hours heat