The strap for this style is no longer available. Please try the very similar and new Mariner style.
The outsole, insole, and toe piece are identical.  The strap is made of Ultrasuede.

The IG8121 Mahi Mahi features Island Pro non-marking Deck Sole and original foot bed design, with the arch, heel cup, and outside contour. The upper is crafted from oiled leather and lined with neoprene for comfort. For the insole we have used two great products from Rubatex Rubber and Torray UltraSuede in a combination that provides superior flexibility and shock absorption, with the soft feel of suede that is durable and water washable. If you are looking for instant and long lasting comfort, this is the one for you. Made in Hawaii USA.

As seen on Living808

Care Instructions

Do not get wet. Exposure to water may cause cracking, shrinking, peeling, and the transferring / bleeding of colors.