The IB911 features the Island Pro Black Lug sole and original foot bed design, with the arch, heel cup, and outside contour. The upper is made from soft cotton webbing that is wider than the traditional nylon web. After a short break-in period, the soft EVA insole will self-mold to your foot's unique shape. If you are looking for lots of mileage and a slipper that lasts, this is the one for you. Made in Hawaii.