【FKM High Quality Material】: The FKM Watch band is made of ultra-high priced fluororubber. It has a higher density than conventional rubber or silicone tapes on the market, is softer and more skin-friendly and bends at will. And the longer you wear it, the more comfortable it is. 【Breathable and Comfortable】: The side of the belt near the skin is densely distributed with microconvex sweat slots to distribute air and moisture. No special smell or sharp edges, harmless, light, flexible and quite robust. 【Size and length】: This watch strap is designed to fit most traditional watches and smart watches which lug width is standard 19mm, 20mm, 21mm, 22mm,Strap length: 125mm + 75mm. The available wrist length for men and women is 5.5"-8.0". 【Dust-free Durable Waterproof】: After long wearing it is still like a new watch strap.Perfect for outdoor fitness, sports, any kind of workout or daily use. 【After-sales service】Our products have undergone strict quality inspections before going on the market. If you have any problems with the product you have purchased or have any questions, please feel free to contact us. We can provide the perfect solution.