Features: The heated shoe insoles use natural materials, and adopt the latest heating material. It heats up faster and lasts longer. Unisex warm and breathable insoles are good products for you in the winter. Keeping your core body temperature balance be essential to body. Heating helps expand blood vessels, allowing oxygen to flow through our bodies more effectively. The heated insoles are safe, anti-skid and shockproof,3-dimensional cutting process. It keeps the wearer warm and moisture proof. They are the best Christmas gifts. Specifications: Color:Yellow,Red Material: Nano Heating Fabric Size:35-36 Foot Length:Approx.23.5cm/9.25in Size:37-38 Foot Length:Approx.24.5cm/9.64in Size:39-40 Foot Length:Approx.25.5cm/10.03in Size:41-42 Foot Length:Approx.26.5cm/10.43in Size:43-44 Foot Length:Approx.27.5cm/10.82in Size:45-46 Foot Length:Approx.28.5cm/11.22in Quantity:1 Pair Package Includes: 1 Pairx Heated Insoles note: Please allow little error on the size due to manual measurement. The color might exist slightly difference due to different displays.