The best of sailcloth, without the drawbacks. A composite nylon upper bonded to a fluorine rubber lower, with tasteful cream stitching. Waterproof through and through, more abrasion resistant than sailcloth, and more heat and chemical resistant than leather or silicone. The protruding rubber pinholes are angled in line with the pin to prevent fraying and improve security. Two piece strap: short piece 75mm (85mm inc. buckle), long piece 125mm 20mm and 22mm lug widths Brushed and polished 304L stainless steel hardware in silver or black Hexagon pattern lower for air circulation and sweat dispersion Compatible with our Apple Watch Strap Adapters in silver or black to match your hardware.