About Chaco Zvolv X2 Sport Sandals (For Women) Closeout. The aptly named Chaco Zvolv X2 sport sandals truly are the next stage in evolution from the classics you know and love. A slimmer, lighter footbed with a bold topographic texture gives the Zvolv its upgraded appeal, but it still retains double pull-through-the-sole webbing straps so you can customize the fit perfectly. Approved by the American Podiatric Medical Association Double-strap webbing upper is stylish and functional, adjusting for a custom fit Pull-through-the-sole straps allow for a custom fit without the added bulk of additional buckles Women-specific LUVSEAT® midsole is made with an extra-soft polyurethane compound Topographic textured grooves on the footbed for traction Non-marking EcoTread 25% recycled rubber outsole compound is optimized for wet and dry traction No box