The IBS523 features the Island Slipper Black Rubber Sole and original foot bed design, with the arch, heel cup, and outside contour. The upper is constructed of top quality genuine suede with a nylon toe piece. For the insole we have used two great products from Rubatex Rubber and genuine suede in a combination that provides superior flexibility and shock absorption, with the soft feel of durable leather suede. If you are looking for instant and long lasting comfort, this is the one for you. Made in Hawaii USA.