360° Surround Heating: Heated socks are made of high quality carbon fiber heating element, 360° all-around wrapping around toes, soles and insteps, which can be heated up quickly within 30s, letting your feet feel warm quickly, which let your feet feel warm quickly in the cold winter, ideal for people with arthritis, poor circulation, frostbite and stiff joints. Rechargeable & Long Lasting Warmness: Our rechargeable heated socks are equipped with 2pcs 3200 mAh rechargeable batteries, which can be used for up to 8-10 hours, and the battery charging time is about 4 hours, the ultra-long battery life and lightweight and portable design can satisfy your long time outdoor warmth needs, which is perfect for long-distance travel and outdoor sports. Upgraded Switch & 3 Levels Temperature: New upgraded winter heated socks add a switch on the side to control temperature or turn on/off, no need to take out the batteries, which is more convenient to adjust. 3 Levels temperature adjustment, white light low temperature (122°F-140°F), blue light medium temperature (140°F-158°F), red light high temperature (158°F-167°F), you can choose according to your own needs to keep your feet comfortable and warm in winter. Comfortable & Washable Material: Winter warm socks for men women are made of pure cotton, which is warm and cozy, breathable and elastic, won't stink and pilling, the fit is snug on the bottom of the foot, which can perfectly support your arch, ankle and toes. Support hand wash or machine wash (put the socks in the laundry bag), remove the batteries before washing. Ideal Choice for Warming in Winter: The thermal socks are perfect for all kinds of winter outdoor work, hunting, hiking, skiing, riding, climbing or fishing. Heated socks for men women fashionable appearance and super warmth is the best gift for family and friends. If you have any questions about the heated socks, please contact us, we will provide you with a satisfactory solution within 24 hours. 360° Surround Heating: Heated socks are made of high quality carbon fiber heating element, 360° all-around wrapping around toes, soles and insteps, which can be heated up quickly within 30s, letting your feet feel warm quickly, which let your feet feel warm quickly in the cold winter, ideal for people with arthritis, poor circulation, frostbite and stiff joints.