The highest quality heated socks with the most sophisticated proportion of materials and at the same time at the best price-quality ratio. 22,5% viscose (cashmir) 52,5% NE Nylon 10% Polyester 15% Spandex. Viscose is one of the best breathable and skin-friendly materials. It does not sensitize, is hygroscopic, absorbs moisture well and is breathable – this is a rarity among artificial fibers 4 degree temperature setting heating temperature: 35-65 fully safe - 3,7V 4000mAh Machine washable (remember to remove the battery) highest quality Lith battery heating time 4-10h charging type C - cable included Long heating time Maximum wearing comfort Highest quality and durability materials Complete set ready for use with Lith 4000mAh rechargeable batteries Quality is noticeable compared to cheaper versions on both rechargeable batteries and materials used, as well as heating power and durability The same quality as branded socks for PLN 600-990. Don't be a moose and don't overpay. Satisfaction guaranteed or the possibility of returning at no cost The socks are very flexible. Universal size will work from 39-44 Length of socks: 30 cm. Incomparable quality and durability to cotton, wool or cheap polyester, which is a good material, but not worth the price or the higher. These materials will not wick away moisture so well, they have weaker foot breathing and affect their bad smell. Complete set with the highest quality rechargeable batteries 4000 mAh High heating power Socks are warm on their own even without heating Heating mechanism not perceptible and not bothering