1. Material: silicone 2. Has good elasticity, wear resistance and environmental protection 3. Soft and comfortable to wear 4. Easy to install and will not harm the watch 5. Easy to adjust the length to fit your wrist 6. 20mm compatible for Garmin Vivoactive3/Vivomove HR Sport/Vivomove/Forerunner245/Forerunner645, suitable for Samsung Gear Sport R600/S2 Classic R732, suitable for LG Watch Sport, suitable for Huami GTR 42mm, etc.; 22mm compatible for Huawei Watch GT Active/Watch GT, suitable for Samsung Galaxy Watch 46mm R800/Gear S3/Gear2 R380, suitable for Huami Amazfit Pace/Amazfit Stratos/GTR 47mm, etc. 7. Note: The product only has a strap, not the main body