Product information: Humanized foot adjustment designAdapts to the curve of the foot so that the close to the sole skin, massage on the soles of the feet allows you to circulate. SOFT AND BREATHABLE SELF-HEATING SOCKS: Heated socks with super comfortable, thick and well-cushioned. Absorbent, breathable, quick-drying, elastic-thicken, use ultra-thin electric heating module. Soft-cushioned reinforced heel and toe. Precise stitching and recessed heating help concentrate heat to the toe to protect your feet to keep you warm in cold weather. Material: Cotton Package Contents: 3 pairs of socksRed Note: 1.Please allow 2%-3% differences due to manual measurement, thanks. 2.Apart from As different computers display colors differently, the color of the actual item may vary slightly from the following images, thanks for your understanding. (1inch=2.54cm).