Chaco designed the ZX/1 Unaweep Sandals with a basket-weave style strap to provide an extra level of comfort for women 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 made it with a lighter and softer polyurethane 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.