Easy to use, this hand warmer crystallizes and releases heat once you click the metal disc. It can be easily carried in your pocket or bag and is reusable. Perfect for sports, fishing, hiking, camping, skiing and other outdoor activities, this hand warmer is the perfect solution for cold weather. It is made of high-quality pvc and gel material. The diameter of each sticker is 9.8cm. Suitable for home, office, winter, outdoor, school, market, park, etc. Item Name: Hand Warmer Material: PVC, Gel Features: Portable, Lightweight, Creative, Wide Application Color: Random Color Size Details: Diameter: 9.8cm/3.86"(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 x Hand Warmer