An Optional velcro strap in black or grey was made available – these straps attached to the primary male connection from the bracelet. Thankfully, The material strap with the IW3715-36 as well as the alternate rubber strap from the IW3548 in good shape the Aquatimer! 3035 provided a quickset date https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/