Hotronic - Heat Socks XLP PFI 30 Surround Thin

Combined with the Hotronic XLP One Power Set Sock Warmer battery pack (not included), Hotronic XLP PFI 50 Surround Thin Heat socks become a complete sock heater system for lasting foot warmth. Features Hotronic Surround heating element starts within the socks&'; double cuff and continues down the socks&'; outer layer and into the toe boxes for extra comfort and targeted warmth Hotronic XLP One Power Set Sock Warmer battery packs (not included) attach to socks&'; inner cuffs using snap fasteners; 2-layer cuffs add protection and battery-pack support Asymmetrical shin and instep protectors increase comfort Reinforced in the toe and heel areas to protect against premature wear Machine washable up to 86AdegF (30AdegC); wash in the included mesh bag Specifications Compression: gentle - PFI 30, 5 - 10 mmHg Material: 80 % nylon, 20 % Lycra / Spandex