Chaco made the ZX/1 Unaweep Sandals with a unique double strap that’s light on the foot and provides an extra level of comfort for men with irregularly shaped feet. Chaco’s new Vibram Unaweep outsole has a self-cleaning lug pattern that offers steady footing on dry trails or river beds. The ZX/1 Sandal is softer and 25% lighter than last year’s Z/1 sandal. Chaco kept their BioCentric contoured footbed, but developed a durable polyurethane with more air bubbles to cut weight. The ZX/1 basket-weave strap configuration features an open toe so you can wear the sandals over neoprene booties in the river or socks at camp.