Toe Cap® heating element heats the toes from above as well as from below improved elasticity in the calf area Ergonomically knitted inside out Ring bandage on the instep for better grip Toe and heel reinforcements additional padding in the shin and fibula area Merino SOFTTEC® material mix for a scratch-free wearing comfort A proportion of silk guarantees maximum comfort can be operated with all “Body Heat System” lithium packs washable at 30°C in the washing machine package contents 1 pair of Lenz heat socks 5.1 toe cap® 1 laundry bag material 30% polyester 25% wool (merino) 20% polyamide 15% polyacrylic 5% silk 5% elastane