Quick-drying straps are made from 100% recycled plastic using traceable REPREVE polyester yarn by Unifi these sandals save 5 plastic bottles from ending up in landfills The Universal Strapping System™ and earth-friendly recycled polyester webbing supports your foot and stands up to abuse Buckle closure gets you in and out quickly Molded PU midsole cushions and supports mile after mile, even with a heavy pack TPU shank stabilizes and supports your foot on uneven terrain Rugged Spider Rubber outsole is extremely durable and supplies great traction Rugged Durabrasion Rubber™ outsole stands up to abuse and supplies great traction Vegan footwear, created using synthetic and plant-based materials