Volt Gen III Indoor/Outdoor Heated Slippers - Black - Large Nylon Upper/Rubber Outsole 6" high 11" wide Includes two powerful 3.7v 2000mah rechargeable lithium batteries, dual charger and wireless remote Size Large fits Men 8 to 9.5, Women 8.5 to 10 Provides between 3  10 hours of soothing warmth to help rejuvenate numb toes and cold, tired feet Ripstop Nylon upper shell fabric and fleece lining, Memory foam cushion footbed for extra comfort Thinsulate insulation traps in the heat encapsulating your feet with warmth