High quality material, comfortable to wear Silicone/Fluoroelastomer material: made of food-grade silicone or fluoroelastomer, soft and skin-friendly, non-toxic and odourless, non-irritating to the skin, friendly to sensitive muscles and comfortable to wear. Genuine leather material: some styles are made of high-quality cowhide, soft to the touch, close to the skin, breathable, suitable for business occasions. Lightweight and breathable design, no burden for sports Breathable holes design: Silicone/Fluoroelastomer strap is designed with breathable holes, which reduces the stuffy feeling and keeps your wrist dry when you wear it, which is suitable for long-time sports. LIGHTWEIGHT & FEELLESS: The strap is lightweight and almost feelless when wearing, suitable for long time use in daily or sports scenarios. Waterproof and sweatproof, strong durability WATERPROOF: Silicone/Fluoroelastomer material is waterproof and sweatproof, suitable for swimming, running, fitness and other sports scenes, easy to clean. ANTI-AGING: The material is anti-aging, not easy to turn yellow and crack, long service life. Various specifications, strong adaptability Adaptable size: regular and extended models are available to fit different wrist sizes and ensure stable wear. Multi-scene application: suitable for sports, fitness, daily wear, business occasions and other scenarios to meet different needs. Easy to clean and maintain WATERPROOF AND DIRT-PROOF: Silicone/Fluoroelastomer material is waterproof and dirt-proof, easy to clean, just wipe with a damp cloth to restore cleanliness. Dirty and durable: the material is not easy to stain, easy to clean, and remains as good as new even after long-term use.