Rainbow 301 Narrow Strap Premium Leather Womens Sandal (Sierra Brown)The single layer premier leather sandal is made of top grade nubuck leather; the top sole is embossed with the Rainbow logo. This model comes with a 1 2" narrow strap, also nubuck leather; it is double stitched, and the nylon toe piece is secured with a box X stitch, all using bonded nylon thread. The single layer mid sole and arch support is triple glued for maximum durability to our non slip Rainbow bottom. We finish it off with the Original Rainbow