Heat Factory Foot Warmer insoles are designed to heat in the restricted air environment of a shoe or boot for up to 6 hours.

When placed under a sock, these thin and comfortable insoles provide soothing warmth underneath your feet.

Ideal for daily use in shoes, ski boots or whenever feet are cold (but not intended for use in open air).

One size fits all.

• Height: 9.75 inches
• Width: 4.25 inches
• Depth: 0.5 inches
• Weight: 1.3 oz