As stated on their website Our kids premier leather is on a non-slip Rainbow® bottom with a single layer but no arch. Now the kiddo’s can be just like everyone else. Premier Leather Single Layer – No Arch Non-Slip Rainbow® Bottom 1" Leather Strap Double Stitched Leather Strap Military Spec Nylon Toe Piece Box X Stitch Pattern Sewn with Bonded Nylon Thread Original Rainbow® Woven Label 4 Small Sizes Have a Back Strap Our kids are made with top grade nubuck leather for durability and comfort, they are a single layer but do not have an arch because little feet don’t quite need them yet. We use a non-slip bottom sole, which is embossed with the Rainbow® name. The 1" premier leather strap is double stitched with bonded nylon thread using a box X stitching pattern. We use the best so that there is no fraying, and the stitching will not pull out. The toe piece is a 2000lb military spec nylon and is triple glued between the layers. They are finished off with our Original Rainbow® woven label on the right toe.