NOW 20% lighter!! BioCentric footbeds and an easy open toe design provide a level of comfort and performance seldom found in sport sandals. Chaco's infinitely-adjustable, pull-through strap system and a single buckle hold your feet securely in all kinds of conditions. Long the gold standard with river guides and outdoor professionals, Chaco's Performance line continues to transform first-time wearers into lifetime believers with durability, BioCentric comfort and incomparable fit. Chaco raises the bar again this season with the introduction of dramatically lighter polyurethane midsoles and two new performance outsoles from Vibram and Stealth. Strap Width: Men's 25mm and Women's 19mm Approx. Weight: Men's size 9 29oz (820g), Women's size 8 22oz (6720g) Unaweep Sole: With Vibram durability, the Unaweep outsole is a great combination of slip resistance, traction and light weight. Lug pattern and spacing makes this sole virtually self-cleaning.