Strap MaterialThe 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.Available Size The length of the band is 121mm/92mm (excluding the buckle) , can fit wrists from about 5.5" to about 8.7" around.Fastening: BuckleQuick ReleseWhat 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.Compatible ModelThis 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.Fashion DesignThe surface of the strap is matte texture design, stylish and exquisite. The stylish dual colour makes your watch be the focus in any ocassion, hightlight your style. The air holes on the strap keep your wrist comfortable all the time, even if you wear it for a long time