Description: Our self-heating thermal insoles can be used to keep your feet warm, and effectively relieve feet fatigue. And more, no batteries or electricity required, safe to use. By the advantages of super soft, breathable, stretchy and friendly to skin, our self-heating thermal insoles are comfortable to wear. It is made of high-quality cotton and sponge material. There are 6 different sizes for you to choose from. This product is perfectly suitable for women, adult, elderly, etc. Item Name: Thermal Insoles Material: Cotton, Sponge Features: Super Soft, Breathable, Elastic, Thickened Size Details: Size 45-46, Length: 28.5cm/11.22"(Approx.) Size 43-44, Length: 27.5cm/10.83"(Approx.) Size 41-42, Length: 26.5cm/10.43"(Approx.) Size 39-40, Length: 25.5cm/10.04"(Approx.) Size 37-38, Length: 24.5cm/9.65"(Approx.) Size 35-36, Length: 23.5cm/9.25"(Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 Pair of Thermal Insoles