Lap the park in ecstasy. Whether smoking the competition or lighting it up in front of the lens, Natasza Zurek packs up the Sapphire™. With a smooth flex, skate-shoe comfort, and a new oversized and ultra-light cushioning system, one rip of this gem will go straight to your head. For those mid-winter marathons, take advantage of the Therm-ic pre-wired Flex™ 2 liner, which provides buttery mobility in a heat-ready package.