Socks with integrated heating to protect from cold feet during outdoor activities. The small pocket with snap closure, which is firmly attached to the cuffs, contains one battery compartment with on / off switch for 3 x 1.5V / AA batteries (Art. 098001) . Batteries not included. Colour: olive. Material: 50% acrylic, 30% wool, 20% nylon. Good and continuous heat distribution Conveniently battery operated Colour: olive