These are brand new and high-quality socks. Made from cotton, polyester, spandex materials. Perfect elastic thickened, great water absorbent, breathable, washable and dries up quickly. The electric modules are ultra-thin and lightweight. Intelligent temperature control switch can be used to adjust three steps temperature range of 38-55 degrees Celcius

Built-in heating elements extended along the bottom of the foot to promote blood circulation. Battery-powered, safe and reliable. Cushioned strengthened rear area and toe, and recessed warming component enable concentration to warm in the toe to shield your feet from getting cold. Excellent for hunting, ice fishing, hiking, and sporting events. A must for chronically cold feet illness.

Specifications:

• Color: Black
• Materials: Cotton, Polyester, Spandex
• Length: 310-330mm
• Power: 12v DC
• Voltage Capacity: 3.7V 2200mAh
• Power Supply: 2 x AAA batteries for each battery box (not include)
• Work Time: 5-9 hrs
• Temperature Range: 38-55 deg. Celcius
• Gender: Unisex
• Size: One standard size fits all

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