STRAP MATERIAL: The watch strap is made of high tensile environmental silicone. It has a smooth finish with good water resistance and durability. And it is soft and comfortable. fits the wrist. The clasp is made of 316L mirror polished stainless steel. which adds a luxurious feel to the strap. FASHION DESIGN: There are many fashionable diagonal stripes on the surface of the strap. elegant and delicate. Total of 24 holes on the straps. which makes it easy to breathe and will not produce sweat when worn. TStrap's proprietary locking feature on holder assures that the free end of the strap stays securely in place. STRAP SIZE: The length of the band is 125mm/75mm (excluding the buckle) . can fit wrists from about 4.8" to about 7.8" around. Our watch has three width options of 18mm. 20mm and 22mm. Before you place an order. please make sure that the width of the watch is suitable. otherwise it will not be suitable.see illustration in the pictures section for how to measure QUICK RELEASE: What you will really like is that quick release is super easy to install. you just have to pull the tiny latch towards the other side. Takes just a minute you can finish the installation and remove process. no tools at all. And we also include a tool for you to remove the old straps. SUITABLE VENUES: This washable. waterproof watch strap is suitable for most brand watches and smart watches. Different colors can be matched with various styles of clothes.It can suitable the office. the gym. swimming pool. surfing. boating and other venues.