DescriptionIt is made from good quality material for long time and durable use. Fine workmanship, good texture, it can provide warmth to you in the cold winter. Intelligent temperature control is very practical. You can use it in your winter warming process.Features-Color:Black-Material:Cotton-Size:37.00X8.00X0.50cm/14.54X3.14X0.20in-It is made of cotton material, which can be used for a long time.-You can send it to your families and friends as a gift, they will be happy.-Applicable to a variety of scenes, such as winter cycling, camping, climbing etc.-With this pair of socks, you will do not need to fear the cold winter, they will bring you warmth.-Very comfortable to wear with intelligent temperature design.Packing list1 x Pair of Socks1 x Pair of Battery Boxes1 x Set of USB Cable