Single Layer Arch Premier Nubuck Leather Box X Toe Construction Original Rainbow Woven Label Non-Slip Rainbow Bottom If any sandal says Rainbow, this is it! This is the Rainbow Sandals staple, the one your kid stole from you because they wanted to be cool and you still have not gotten it back yet. This is the Flag Ship! The single layer premier leather sandal is made with top grade nubuck leather; the top sole is embossed with the Rainbow logo. The strap, also nubuck leather; is double stitched, and the nylon toe piece is secured with a box X stitch, all using bonded nylon thread.