Mountain Lab Bluetooth Heated Socks YCRF_mc_mx_boots the double walled vacuum insulated

the double walled vacuum insulated technology helps your drinks stay hot or cold for hours

Sizes (head circumference): SM - MD: 55-58cm

With 5 shell sizes the Custom 500 is sure to give the rider a personalized fit regardless of where you are on the size chart

Boa® fit system for fast precision fit

Fresh and smooth breathable fabric

Mountain Lab Bluetooth Heated Socks YCRF_mc_mx_boots the double walled vacuum insulatedThe Bluetooth Heated Socks use the Mountain Lab smartphone app to control the heated socks through Bluetooth connectivity. Each sock can be controlled individually for heat intensity and turned on and off. The Bluetooth Heated Socks can alternatively be controlled by a button located on the cuff of the sock, for use without the app.