The Apple Watch 40mm Silicone Watch Strap Sport Lemon Cream S/M & M/L is made of high-quality fluoroelastomer. That makes the watch strap very strong, but also flexible, soft, and light. The silicone strap is made by Apple itself and will last a long time, thanks to the strong material. The pin clasp, which can be found on the inside of the strap, doesn't protrude the end of the wrist strap. It's concealed nicely behind the silicone strap. This watch strap is suitable for the Apple Watch 40mm, which fits a wrist with a circumference between 30 and 200mm. This is an original Apple accessory.