NWT Oofos Ooriginal Recovery Thong Flip Flop Sandal Size Men 9 Women 11 Navy Blue THE ORIGINAL RECOVERY FOOTWEAR™ The Sandal that started it all. With its sleek design and OOfoam™M recovery technology, the Original Sandal was proven to be so effective, its spirit lived on in all our later styles and models. And with more colors than ever to choose from, you can flex your recovery leaving the gym as much as you can at a backyard hangout with friends.