Keep feet warm on cold days with these foot warmer insoles for shoe sizes 41-45. Each thermal insole activates on its own: remove it from the package, shake it gently and it reaches working temperature in approx. 10-15 minutes, then delivers heat for 8+ hours without batteries.

Ideal for ice fishing, winter sports, match days and outdoor work, these insoles put steady warmth right where the cold bites first. Because they need no cables or charging, they are always ready in a pocket, glovebox or backpack. With 20 insoles in every pack, you are covered for many cold outings to come. Make them part of your winter kit this season.