An Optional velcro strap in black or gray was available – these straps hooked up to the first male hyperlink in the bracelet. The good thing is, The material strap in the IW3715-36 and the alternate rubber strap through the IW3548 in good shape the Aquatimer! Using a choice of https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/