Rainbow Women's Premier Leather Single Layer Arch Support Sandal - Mocha The Rainbow Premier Leather sandal is made with top grain nubuck leather top sole and embossed withe the Rainbow logo. The strap is double stitched nylon into the nubuck leather. The nylon toe piece is secured with a Rainbow box 'X' stitched pattern made with bonded nylon thread. The Premier Leather Single Layer Arch Support is Rainbow's iconic and most famous sandal that everyone should have in their wardrobe.