Vionic Womens Relax Slipper Blue Hearts Size 9 Polyester^Terry Heel measures approximately 1.5 inches" Hook-and-loop adjustable straps for easy-on / easy-off operation. Convenient- pain-free natural healing solution to many of the common aches and pains associated with poor lower limb alignment. Orthaheel technology is clinically proven to reduce excess pronation- a contributing factor to flat feet. & plantar fasciitis EcoFresh anti-bacterial odor-reducing footbed and linings. Fabric covered TPR outsoles with wave-patterened tread provide stability and traction for indoor use.