An Optional velcro strap in black or gray was made available – these straps attached to the initial male link from the bracelet. The good thing is, The material strap from the IW3715-36 and also the alternate rubber strap in the IW3548 healthy the Aquatimer! Past its excellent corrosion resistance, https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/