The Active Strap Pro is crafted with advanced hybrid construction, featuring waterproof leather and FKM rubber, making it our most versatile strap. It combines the subtle silhouette of a modern leather band with high-performance FKM lining and ventilation channels, offering both functionality and style. It’s waterproof, made of Heinen black leather from Germany, and features a fluoroelastomer FKM rubber coating, interior ventilation channels, and custom stainless steel eyelets and buckle. Designed for Apple Watch Series 6, SE, and all previous models.