1. Material: TPU
2. Accurate opening, does not affect the use of keys
3. Soft, not easy to deform
4. Hollow back design, does not block the heart rate sensor, does not block the buttons
5. 2mm higher than the dial, effectively avoiding daily collision and friction
6. Easy to install, will not cause damage to the watch
7. Note: The product has only the case, not the main body
2. Accurate opening, does not affect the use of keys
3. Soft, not easy to deform
4. Hollow back design, does not block the heart rate sensor, does not block the buttons
5. 2mm higher than the dial, effectively avoiding daily collision and friction
6. Easy to install, will not cause damage to the watch
7. Note: The product has only the case, not the main body