From Twisted X®, the Men's Chukka Driving CellStretch® Mocs feature: Leather upper featuring quilted-look leather on vamp CellStretch® technology utilizes cells in the forefoot and heel to provide superior cushioning and comfort ecoTWEED™ material is made from recycled plastic bottles Nylon laces Mesh lining Footbeds also feature ecoTWEED™ lining Blend85™ footbed made with recycled foam Nylon/glass fiber shank Oil and slip resistant rubber outsole Imported.