OOFOS OOahh Slide Recovery Sandals Blue Water Drop Size W9 M7 Unisex muted blue-grey with a distinct purple undertone Made with proprietary OOfoam™ technology, a closed-cell material that absorbs 37% more impact than traditional EVA performance foam. Built with a pronounced arch geometry and a rockered sole profile to alleviate compression forces and smoothly roll the foot through each step without loading the calves. In good condition