Fit & Design: Strategically placed heating elements use ultra-fine fibers for optimal heating performance An integrated heating system located along the fingers and thumb Innovative outer shell construction, faux suede palm & brushed polyester lining provides extreme warmth A thin layer of Thinsulate supplies quality insulation & wind protection Weather-tight elastic cuff with cinch cord Lightweight Slim Fit Textile Construction Exterior shell constructed of heat-trapping material provides maximum warmth and comfort Technology: Onboard temperature control button allows easy access to the 3 heat settings providing adjustable warmth Waterproof zippered battery pocket stores rechargeable lithium-polymer battery Fantex waterproof membrane Additional Details: Two ActionHeat 5V Battery Heated Mittens Two Rechargeable 5V 3000mAh Batteries One 24" Dual battery charger kit Heating time: high (red) – 140 2+ hours Heating time: medium (white) – 120F 3+ Hours Heating time: low (blue) – 100F 5+ hours ActionHeat Women's 5V Battery Heated Mittens