An Optional velcro strap in black or grey was supplied – these straps connected to the main male hyperlink with the bracelet. The good news is, The material strap through the IW3715-36 as well as the alternate rubber strap in the IW3548 in good shape the Aquatimer! The Rolex Submariner https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/