The Max Hybrid watch strap has been made from premium FKMrubber and TPU. Combining Fluororubber and Thermoplastic Polyurethane makes this band the most durable watch strap in our range . Its style and materials meanit is suitable for all occasions, everyday use but also tough enough towithstand extreme adventure sports like Scuba Diving, surfing & RockClimbing.Compatible with Mechanical and Smartwatches.See list of smartwatches below:Amazfit GTS | 20mm widthAmazfit GTR (42mm) | 20mm widthAmazfit GTR (47mm) | 22mm widthAmazfit Bip & Bip Lite | 20mm widthAsus Zenwatch 2 1.63" | 22mm widthFossil Sport (43mm) | 22mm widthFossil Gen 5 | 22mm widthHuawei Watch 2 | 20mm widthHuawei Watch 2 Classic | 22mm widthMoto 360 2nd Gen Men's 42mm | 20mm widthMoto 360 2nd Gen 46mm | 22mm widthSamsung Galaxy Watch (42mm) | 20mm widthSamsung Galaxy Watch (46mm) | 22mm widthSamsung Galaxy Watch Active | 20mm widthSamsung Galaxy Watch Active 2 (40mm & 44mm) | 20mmwidthSamsung Gear S2 Classic / Sport | 20mm widthSamsung Gear S3 Classic / Frontier | 22mm widthTicwatch 2 / E / S | 20mm widthTicwatch Pro / E2 / S2 | 22mm widthWithings (Nokia) Steel HR & Steel HR Sport 40mm | 20mmwidthThese watch straps also fit hundreds of other smartwatchand mechanical watches. Just measure your watch lug lengths before ordering.If you have any issues with size etc, please contact us and we will be happy to help with any queries.