Prince NFS Rally Shoes : For Comfort, Great Fit and Grip.Natural Foot Shape (NFS)Air Mesh - To maintain the shape of the shoe and provide ventilation.Duraskin XD - A strong rubber compound placed at the toe to reduce the wear as the foot slides.Synthetic Upper - A synthetic upper to reduce the weight of the shoe whilst keeping the durability of tough materials.Lightweight EVA - To absorb shock and help reduce the impact through the joints.Gum Rubber Outsole.