I prefer the SBDX001 on rubber and I have added a number of various 20mm rubber straps to enjoy this diver and changing the look slightly with color and texture of the strap. Honestly the bracelet just wears a little heavy IMO. The ability for this MM300 to be a strap monster has really held my interest and has allowed for an extended Honeymoon period. I currently own waffle straps in black, blue, and orange, recreation of the Tire Tread, recreation of the GL831, recreation of the Tropic, recreation Chocolate bar, and OEM rubber. Have owned the 20mm Marathon black rubber in the past and might add it to the mix. Isofrane? Not yet but I have owned them in the past for other divers. Living on the Gulf Coast of Florida I hope to someday get this one in the water.