Rainbow Double Skinny Premier Leather Women's Sandals - ExpressoThe Rainbow Double Skinny Premier Leather Women's Sandals. The double layer classic leather sandal offers all the great features found in our single layer leather, but with an added layer of midsole for more cushion and arch support. The double layer classic leather sandal offers all the great features found in our single layer leather, but with an added layer of midsole and pin line, which starts at the arch and rises towards the heel, for even more