This replacement sports strap is made of soft, flexible polyurethane, a high-quality synthetic material combining the best features of plastic and rubber. The many sizing holes allow you to adjust the band to fit your wrist. It will not be damaged by water. <br><br> The band has a tapered shape.It mostly measures 20 millimeters (13/16 inch) wide, with the widest part measuring 25 millimeters (1 inch) wide and the narrowest part measuring 16 millimeters (5/8 inch) wide. The end where the strap attaches to the watch case measures 22 millimeters (7/8 inch) wide.