Made in the USA or Imported Rubber sole The Z-Trail EV sport sandal fits true to size. Xero Shoes Z-Trail EV gets rid of 70% of your usual sport sandal's weight and bulk. The super flexible sole lets your feet bend and move naturally. Upper webbing is Unifi recycled plastic bottle yarn. Tubular quick-dry webbing (now made with nylon from recycled water bottles) adds comfort, and adjustable heel and instep straps give a secure fit. The yokes are Clarino synthetic microfiber.