Pig Suede Leather and Breathable Mesh - Keeps feet fresh and comfortable. Protective Toe Cap - Shields toes from knocks and bumps. Bellowed Tongue - Keeps debris out, and prevents chafing. 100% Recycled Laces - Keeps feet locked in and secure. Kinetic Fit Advanced Removable Contoured Insole - Enhanced heel and arch structure provides stability and support.