Easy installation on your 38 millimeter or 40 millimeter Apple watch -- just slide into the watch case; fits all 38mm Apple Watches including series 1, series 2, and series 3, as well as 40mm series 4 and series 5
Made of polyurethane, a soft and flexible synthetic material that is more durable than rubber or plastic; stainless steel buckle
Extra long watch band: sizing holes accommodate lengths from 4 3/8 to 7 5/8 inches (111 to 194 millimeters); entire band measures 8 1/16 inches (205 millimeters) long
Waterproof; this watch band can be used underwater including for swimming and scuba diving
Watch strap measures 19 millimeters (3/4 inch) wide in most areas and wider near the ends where it attaches to the watch