Heat duration: Up to 8 hours of lasting warm soles with an average temperature of 39°C. No electricity, boiling or additional heating of foot warmers required Comfort: The ultra-thin and comfortable toe warmers are barely noticeable and fit any shoe bed - whether it's a ski boot, winter boot or an elegant ladies’ shoe Natural ingredients: The sole warmers consist of iron powder, water, salt, activated carbon and vermiculite. Heated insoles are the perfect product for warm feet for children, women and men Use: Open the packaging, and the heatable insoles will heat up by themselves after a few minutes’ contact with oxygen. Remove the film from the heating inserts and stick to the top or bottom of the socks Areas of use: The shoe warmers are ideal for outdoor activities, winter sports of all kinds, winter walks and visits to the stadium and the Christmas market. Can be kept for several years unopened

Technical Details Color: ‎5 pairs Size: ‎200 x 125 x 25 mm Material Type: ‎Iron powder, salt, activated carbon, vermiculite Outer Material: ‎Non-woven Power Source: ‎Activated by air Seasons: ‎Autumn-Winter Features: ‎Lightweight Sport: ‎Mountaineering Included Components: ‎Iron powder, Salt, activated carbon, vermiculite Batteries Included?: ‎No Brand: ‎TerraTherm Department: ‎Unisex Manufacturer: ‎BGT GmbH & Co.KG Item model number: ‎TT_TW_5_001 Product Dimensions: ‎9.5 x 7 x 0.3 cm; 180 g ASIN: ‎B07T6FK77F Additional Information Date First Available: 18 Jun 2019

Iron powder Salt activated carbon vermiculite