Design: Breathable upper made with 100% recycled P.E.T. mesh across the top of the foot 50% recycled polyester-spandex spacer-mesh heel Collapsible heel can be worn up for light support or folded down for easy on/off In-Shoe Comfort: Fully removable, molded internal footbed made with 30% recycled EVA provides comfort and shock absorption Raised texture on footbed helps to prevent foot slippage and provides additional underfoot comfort Durability & Traction: Durable translucent rubber outsole for protection indoors or outdoors Additional Details: Approx Weight (½ pair): 9.07 oz (257 g)