Amazfit Balance Smart Watch

Material: Silicone 2. Technology: This product is made of silicone material, which is waterproof, sweat-proof, comfortable and soft. 3. The strap adopts a thickened design, which is comfortable to wear and easy to use. 4. The material is harmless to human skin and non-allergenic. 5. Suitable for wrist circumference: 5.5-8.7 inches