For Huami Amazfit T-Rex / T-Rex Pro / Ares Adjustable Watch Strap Flexible Nylon Bracelet Smart Watch Breathable Band for Women / Men - Blue Made of Flexible Nylon, which is waterproof, sweatproof, comfortable, and soft The strap is thickened, which is comfortable to wear and easy to use The material has no harm to human skin and is not allergic Multi-color for option, meeting different style need Suitable for work, leisure occasions, or other daily occasions for women/men A good choice for you to find an alternative strap for your smart wristband Specification: Material: Nylon Length: 225mm Width: 22mm Wrist: 160-220mm Compatible with: Huami Amazfit T-Rex / T-Rex Pro / Ares Package included: 1 x Watch Strap 2 x Tool Other things not included Size: 135-175mm (Without watch)