RAINBOW SANDALS. 301ALTS0-NAVY. MENS SINGLE LAYER PREMIER LEATHER WITH ARCH SUPPORT SANDAL. NAVY. If any sandal says Rainbow this is it. 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. The single layer midsole and arch support is triple glued for maximum durability to our non-slip Rainbow bottom. We finish it off with the Original Rainbow woven label on the right strap the mark of a genuine Rainbow Sandal.