Amazon.com | Xero Shoes Men。Xero Z-Trek Men\'s Lightweight Packable Sport Water Strappy Sandals Orange/Black US Men\'s Size 9 ***RUNS 1/2 Size Large Excellent Condition Manufacturer Description: The Z-Trek is an upgrade to the popular original, now with smooth, tubular nylon straps made from rPET recycled materials. The fully adjustable strap system lets you fine tune your fit, giving you the security you love in Xero Shoes. The 6.0 mm FeelTrue® sole gives fantastic ground feel while still protecting you from the elements, while the dual direction chevron tread provides you confident grip. All that and they still only weigh 7.2 ounces each for a men’s 9.