An Optional velcro strap in black or grey was presented – these straps connected to the primary male link on the bracelet. Thankfully, The material strap with the IW3715-36 along with the alternate rubber strap from the IW3548 fit the Aquatimer! bezel The bezel is generally outfitted with possibly aluminum https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/