Ryka - KM Stability Walk (White/Dove/Halo/Black) - Women's: For the performance walker who demands optimal stability, shock absorption, and rebound throughout the walking gait cycle!; Leather and mesh upper for breathability and comfort. Nitracel Engage Lasting System shoe construction provides an extra layer of full foot cushioning and rebound foam. Respond Foam in collar and tongue conforms to the shape of your foot offering customized fit and long lasting comfort. Superknit moisture wicking materials on sock wicks moisture away and aids in blister prevention. Elemental Technology System (E.T.S.) Cushioning Cartridge in rearfoot and forefoot for optimal combination of cushion and shock absorption. TPU midfoot shank for torsional support and stability throughout the walking gait. Dual-Density posting for motion control. Distance Plus high abrasion rubber at heel strike for wearability. Rearfoot RYK Impact Foam absorbs heel strike impact. RYK is proud to be a National Sponsor for the Avon Walk for Breast Cancer. RYK's involvement in this important crusade supports its continued commitment of giving back to the woman's community.