Gerbing's Heated Sock Liners are the best battery powered socks available on the market. These new Gerbing socks come ready to use with 2 new red batteries and dual battery charger. Gerbing Core Heat 7 battery powered sock liners provide ultimate warmth during all of your winter activities. These great heated socks warm your entire foot and also wicking moisture to keep you warm and dry. Battery Powered Sock Liners Elastic band for comfort fit 4-way stretch fabric Wire harness available for use with waders or knee boots 4 Heat Settings Mobile warmth for your feet Targeted Warmth With Microwire heat technology your feet will stay warm for hours on each charge. If you have ever suffered from cold feet this is the product for you. You can now have warm feet wherever you go. Keep in mind the socks will put out serious heat and you will need to use the controller on the battery to regulate for optimal thermal comfort. Gerbing Core Heat Sock Liners Include: 2 Sock Liners (1 pair) 2 Rechargeable Lithium-Ion Batteries 1 Dual Battery Charger 2 Leg Straps/Clips Instuctions Gerbing Core Heat 7 Battery Powered Clothing: The Core Heat 7 thermovelocity system is powered by 7V lithium ion batteries that provide mobility and warmth for any outdoor activity. Coreheat7 garments are designed to keep you warm while hunting, working, skiing, or just walking the dog. Gerbing Microwire Heating: The Microwire system is the most durable and efficient thermo-technology platform ever developed. Products incorporating Microwire technology utilizes patented micro-sized stainless steel fibers intertwined and encased in a proprietary waterproof coating. Gerbing Microwire technology will provide even heating for ultimate comfort. Gerbing Core Heat 7 Volt Battery Products Include: Includes the battery and charger you need to power your Gerbing heated product. You may purchase additional batteries and extended-life batteries for prolonged use. Due to the nature of this product, retu