Adult ActionHeat 5V Indoor and Battery Heated Shearling Boots 675595-AH-BOOT-5V The ActionHeat Rechargeable Battery Heated Indoor/Outdoor Boots offer unparalleled versatility, warmth, comfort, and durability. Made out of polyester fabric, these boots were designed to block the cold out, and keep the warmth in, and were designed to be worn inside or outside. They are powered by rechargeable 5V batteries and can last up to 5 hours.HOW TO USE:Power Up - Charge the provided ActionHeat 5-Volt batteries.Plug-In - Connect the batteries to the USB cords located in the pocket on the side of the boot.Turn On - Press and hold the touch-button control on the sock for 3 seconds. Press the button to cycle through the heat settings.Features:Comfortable heated solesSoft polyester lining provides warmth, comfort, and versatilityStrategically placed heating elements use ultra-fine fibers for optimal heating performanceAn integrated heating system located on the bottom of the footHeating panels encapsulated with a thermal seal provide additional durability & moisture protectionEstimated Heating Times:High (Red): 150F - 3.5+ HoursMedium (White): 130F - 4+ HoursLow (Blue): 115F - 5+ HoursMaterial Contents:Outer Shell: Polyester: 100%Lining: Polyester 100%Includes:(2) ActionHeat Rechargeable Heated Indoor/Outdoor Boots(2) 5V Volt Lithium-Polymer Rechargeable Batteries(1) 24" Dual Battery Charger Kit California Residents WARNING: Cancer and Reproductive Harm - Adult ActionHeat 5V Indoor and Battery Heated Shearling Boots