Comformation Winter Warm Cotton Heated Socks for Men Women US Size 8-12 Imported Washable Electric Heated Socks Rechargeable Battery Foot Warmers Socks 3 Heat Level Settings Adjustable Camping Cycling Hiking Motorcycling Electric-bicycle Heated Socks 3 Heating levels to be adjustable.Different temperature settings depending on how hot you want.With the battery on,High (Red), medium (Orange) and Low (Green), keep your feet from freezing.The heat elements for these heated socks are discreet and in front instep. The heating unit has 3 settings and can be controlled easy,provide heat and gradually spread the warmth to cold feet.The winter heated socks heat up fast and get nice and toasty. Walking around in the winter and not having frozen feet. These heated socks are washable. 1)Machine wash: fold wrapped heating area for socks and then put into the laundry bag to protect the inside heated element 2)Recommended Hand wash,soft wash QILOVE warming socks are comfortable and thick to keep warm without even turning on. Heats up in about a a minutes time. Men Women Heated Socks US Size:6-12 .Great for rain-boots or knee length boots, xcrountry boots,Sorels and ski boots to take outdoor activities-hunting,ice fishing,hiking,cycling or indoor activities-playing game,read,watching TV.Be a ideal option at keeping your feet warm in freezing weather. Good for those who easy get cold feet or have raynaud’s feet freeze,improve blood circulation and reduce soreness. Satisfaction Guarantee Warranty: All QILOVE Brand Heated Product are guaranteed for 1 year. If you have any problems for product,please contact the QILOVE seller through order ID by sending Amazon buyer message or take a question on product page.