An Optional velcro strap in black or gray was presented – these straps connected to the first male url on the bracelet. The good news is, The material strap through the IW3715-36 as well as the alternate rubber strap through the IW3548 in good shape the Aquatimer! “Swiss Built” on https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/