The Shelley has a durable but flexible sole, neoprene underlay and adjustable straps, making it a perfect choice for beachy days in the sun Fastening:Touch Fastening Material Composition:Leather/Textile/Other Materials Textile Upper with Soft Neoprene Underlay for Added Comfort. Double Touch Fastening Straps for Extra Fit Adjustment. Soft and Comfortable but Hardwearing Phylon Insole. Lightweight and Flexible Phylon and Rubber Outsole.