Quick-dry straps made from 100% REPREVE recycled plasticLined with lightweight, breathable, and 60% recycled polyester mesh that keeps your feet cool and comfortableEasy hook-and-loop closure comes on and off quickly and gets the fit just rightMolded PU midsole cushions and supports mile after mile, even with a heavy pack, Nylon shank stabilizes and supports your foot on uneven terrainRugged Spider Rubber outsole is extremely durable and supplies great tractionSustainability Initiative(s): Vegan, Webbing made from recycled plastic using traceable, verifiable REPREVE polyester yarn by UnifiBest for: multi-day hikesHalf pair weight for size M9: 14.25ozRN 88276.