This black-grey Active Pro wristband is made of waterproof Heinen leather from Germany with an FKM fluoroelastomer rubber coating. These materials give it excellent resistance to friction and sweat. This strap is used to wear the Apple Watch 6 and SE. - Properties and product features: This black grey Active wristband is 100% waterproof and has water and sweat resistant properties.... This black-grey Active Pro wristband is made from a mix of high-quality materials: Heinen leather and FKM fluoroelastomer rubber. This black-grey NOMAD wristband has internal ventilation channels. The eyelets and the fastening buckle are made of specially manufactured stainless steel.