Xero Shoes Z-Trail EV Women’s 9 NWOT - only tried on in the house The Z-Trail EV features an updated 11 mm FeelLite™ sole with a middle layer of TrailFoam™ and an updated dual chevron lug pattern that offers the best combination of comfort, protection, and trail-ready traction while still allowing you to bend, move, flex, and feel the terrain beneath your feet. At just 4.3 oz each for a women’s 7, the Z-Trail EV remains just as lightweight and packable as the original best-selling Z-Trail. The Z-Trail EV eliminates 70% of the unnecessary materials used in modern sports sandals – and because its soft, tubular quick-dry webbing is made from nylon sourced from recycled water bottles, it’s even better for the planet than before!