Here's how we elevate the oxford - The Grand City Platform Oxford puts a modern, menswear-inspired leather lace-up over an innovative midsole made from our proprietary FlowerFoam™ cushioning, an ultra-lightweight compound made with a minimum of 25 percent dandelion rubber. Leather upper in Dark Cuoio; three-eyelet lacing systemFlowerFoam™ midsole made with a minimum of 25 percent dandelion rubber; 45mm (1.77-inch) heelCushioned footbed covered with breathable, antimicrobial fabric to help control odor