FKM fluoroelastomer rubber 100% waterproof Interior ventilation channels Custom aluminum closure pin Designed for Apple Watch Ultra, Series 8, 7, 6, SE, and all previous versions of Apple Watch The Nomad Sport Strap V2 gives any Apple Watch a modern and sporty look while being ideal for intense workouts and everyday use. The Sport Band has a lightweight and breathable design made from a soft, flexible fluorocarbon rubber for extra comfort. Fluororubber is a fluoroelastomer that is antimicrobial and can be easily cleaned and disinfected with soap and water. The material ensures an ideal balance between comfort and durability. The flexibility of FKM also ensures a comfortable fit. Thanks to the inner ventilation channels on the underside, the bracelet is breathable. A secure hold is d by the pin closure, both the aluminum pin and the sports band itself are waterproof and therefore do not require any special care. Whether home workout, swimming or jogging - the Sport Strap withstands all sporting challenges.