5 PAIRS of heated insoles in 3 different sizes S, M, L in white - never have cold feet again. Keep your feet warm and enjoy maximum comfort while walking, hiking, skiing, snowboarding, or other outdoor activities with these heated insoles! Super thin soles (only about 3 mm high). Simply place them in your shoes and keep warm for up to 8 hours. No more cold feet. Once you open the packaging, the insoles become warm. Available in 3 sizes so you can find the perfect fit. Try them now and enjoy the winter adventure! The disposable insoles are very comfortable and keep your feet warm for up to 8 hours. Sizes: S: Shoe size 36-38 (Length approx. 20.5 cm) M: Shoe size 39-41 (Length approx. 23 cm) L: Shoe size 42-45 (Length approx. 25 cm) Color: White Material: Polyester, activated carbon, iron powder Weight: 100 g Contents: 5 pairs of heated insoles in your chosen size