The OOahh Sport Flex sandal features the same revolutionary OOfoam™ impact-absorbing recovery technology found in each and every pair of OOFOS. This technology aids in the recovery process and creates an incredibly comfortable sandal you can wear anywhere. The Sport Flex is a more versatile option, featuring an adjustable Velcro strap closure that allows the wearer to get the best fit, whether their foot is a narrow or a wide width.