The ActionHeat AA heated insoles are ideal for any cold-weather activity. Powered by AA batteries, these insoles heat up to 140F and last more than 2 hours. With built-in, ultra-fine heating panels strategically placed under the toes, your feet never have to be cold again! Featuring an easy on/off button, it's easy to add warmth and keep your toes nice and toasty. Design: Heats up to 140F for up to 2+ hours An integrated heating system powered by AA batteries Ultra-thin and lightweight design for maximum comfort Fits in all types of footwear, shoes, and boots Cut-to-fit adjustable sizing with an easy guide How To Use: Power Up - Insert (3) AA batteries into each power pack Plug-In - Connect the power pack to the cord connected to the back of the insole Turn On - Press the red power button on the power pack to turn it on Includes: (2) ActionHeat AA Insoles With Heated Toes (2) AA Power Packs; Each Requires (3) AA Batteries (Batteries Not Included)