Horween Leather Island Slippers. For more than 60 years Island Slipper has made sandals for all of Hawaii. Island Slipper's Horween Leather sandal features the Island Pro Black Lug sole and original foot bed design, with the arch, heel cup, and outside contour. The upper is cut from genuine Horween Leather. For the insole we have combined the Rubatex Rubber and the Horween Leather for an unbeatable leather feel and durability. If you are looking for instant and long lasting comfort, this is the one for you.