"The ActionHeat 5V Indoor/Outdoor Battery-Heated Boots for Men offer unparalleled versatility, warmth, comfort, and durability! Made 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. An integrated heating system with strategically placed heating elements deliver optimal heating performance, and thermal seals around the heating panels offer extra durability and moisture protection. These heated boots are powered by rechargeable 5V batteries (included) and can last up to 5 hours. Includes 24"" dual battery charger. Imported.Manufacturer style #: AH-BOOT-5V. 100% polyester Can be worn inside or outside Integrated heating system with strategically placed heating elements Thermal seals around heating panels for durability and moisture protection Last up to 5 hours on a single charge Includes 2 rechargeable batteries and a battery charger"