An Optional velcro strap in black or grey was available – these straps attached to the main male hyperlink with the bracelet. Thankfully, The material strap in the IW3715-36 and the alternate rubber strap from the IW3548 suit the Aquatimer! “Swiss Created” around the dial of your watch - Hunt https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/