Self-activating foot warmer insoles bring steady heat to cold feet in shoe sizes 35-40. Simply take a thermal insole out of the package, give it a gentle shake and it warms up in approx. 10-15 minutes, then keeps going for 8+ hours. No batteries, no charging, no fuss.

Cold feet can ruin a winter walk, a day in the stands or a long shift outside. These thermal insoles sit inside your shoes and warm up within approx. 10-15 minutes after opening. With 20 insoles in the pack, you can keep a few in the car, the backpack and the jacket pocket so warmth is always close at hand. Stock up before the next cold snap.