Feature: 1. Rapid Heat Generation: The insole heats up quickly throughout the soles of the foot, with an average temperature of about 45°C, and continuous warmth. 2. Independent Packaging: Heated insoles foot warmer adopts clean and hygienic independent packaging, compact and portable. 3. Comfortable to Use: Wormwood self heating insole is comfortable, shock absorbing and non legged, tightly pressing the edges and no powder leakage. 4. Continuous Warmth: Disposable foot insole heated free of charge, easy to use, continuous warmth, effective warmth. 5. Wide Application: Self heating insole can be used in multiple scenarios, such as school, outdoor work, office work, etc. Specification: Item Type: Heated Insole Product Material: Wormwood, Non Woven Fabric, Iron Powder, . Package List: 20 x Heated Insole Note: 1.The insole is disposable, please do not reuse it.2. This product starts to heat up after unpacking. Please do not open the separate package if you do not use the product. Use a pair for one day.