Specs Direct Attach Construction. Molded without glue. Simple, clean and durable. - 3D Knitted Uppers. No waste, nothing is cut, there are no scraps. 100% recycled polyester yarns. - Aluminum Buckles. Low profile, non-slip and unbreakable. Minimal and secure. - Microfiber Suede Footbeds. Smooth, cool and comfortable. Anti-microbial treatment keeps sandals fresh. - Ultra-Lightweight Polyurethane Midsoles. The comfort and weightlessness of EVA with the durability of polyurethane. - Durable Rubber Outsoles. Slip resistant and resoleable, with recycled content and an arrowhead design. - Weight single women&';s 8 = 220ms/7.7 oz. - Arch Support: Compare to the medium arch height of Tread Labs insoles.