The 1200 BT Pro Set includes a pair of Heat Sock Toe Cap® 4.1 and an Rcb 1200 battery pack. Heat Sock Toe Cap® 4.1 are heated socks with an integrated heating element that warms both the top and underside of the toes, keeping feet warm even in cold conditions. The elastic calf section ensures a good fit – even for wider calves – and the comfort cuff keeps the sock securely in place without slipping. The socks are anatomically knitted for left and right foot and feature a ring bandage for optimal fit. Padded reinforcements protect both toes and heels. The material is a blend of natural merino wool and technical fibres, providing effective moisture wicking and heat retention. The included lithium battery attaches easily to the comfort cuff with press studs and is controlled either by pressing a button or via a free smartphone app.