Sidas One 3 Bootwarmer Set with Custom H Element

The Sidas One 3 Bootwarmer Set with Custom H Element lets you ski, hike, and camp with toasty toes regardless of the temperature. This set includes two One 3 batteries that clip onto most boots with ease and provide gentle, constant warmth in three modes for up to six hours. These batteries plug into the included adhesive Custom H element that turns your existing insole into a luxurious heat source.