Built in biomechanics for the barefoot enthusiast! The Collin men's Orthotic Thong features a dual density midsole, integrated post & shank and comfort cushioned footbed, with true arch support. Once you try the Collin Ortho Thong, you'll never want to wear ordinary, flat flip-flops again! The Collin Ortho Thongs are available in two colors - Black and Chocolate.