An Optional velcro strap in black or grey was supplied – these straps connected to the main male link in the bracelet. Luckily for us, The material strap in the IW3715-36 along with the alternate rubber strap with the IW3548 in good shape the Aquatimer! But it appears to be https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/