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Heat Factory Footwarmer Insoles are designed to heat in the restricted air environment of a shoe or boot for up to 6 hours. When placed under 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. Not intended for use in open air.

Sold as pairs only. One size fits all.

Specifications:

- Height: 10.5"
- Width: 4.5"
- Depth: 1/8"
- Weight: 2.40 oz.