Rainbow Single Skinny Premier Leather Women's Sandals - BlackThe Rainbow Single Skinny Premier Leather Women's Sandals. If any sandal says Rainbow, this is it! This single layer premier leather sandal is offered with a 1 2" narrow strap for a feminine touch. 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