"Full Description:\nThe 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 soles Soft polyester lining provides warmth, comfort, and versatility Strategically placed heating elements use ultra-fine fibers for optimal heating performance An integrated heating system located on the bottom of the foot Heating panels encapsulated with a thermal seal provide additional durability & moisture protection Estimated Heating Times: High (Red): 150F – 3.5+ Hours Medium (White): 130F - 4+ Hours Low (Blue): 115F – 5+ Hours Material 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\n\nFeatures:\n\u003cul>\n\u003cli>Rechargeable 5V battery provides up to 5 hours of heat\u003c/li>\n\u003cli>Three adjustable heat settings: High, Medium, and Low\u003c/li>\n\u003cli>Polyester fabric blocks cold and retains warmth\u003c/li>\n\u003cli>Can be worn indoors or outdoors for versatile use\u003c/li>\n\u003cli>Integrated heating system on the bottom of the foot\u003c/li>\n\u003cli>Heating panels with thermal seal for durability and moisture protection\u003c/li>\n\u003cli>Includes dual battery charger for convenient charging\u003c/li>\n\u003c/ul>\n\n"