Brooks Women's Ariel '12 Motion Control Running Shoes, Color: Slv/OmbrBlu/DzlngBlu/Wht/LnrRk, Size: 7.5 Your feet, legs and back will appreciate the shock-absorbing properties of a full-length layer of DNA custom cushioning gel, a viscous liquid that adapts to your unique biomechanics, pace, weight and the running environment Sleep easy knowing that the Ariel 12's midsoles are crafted from earth-friendly BioMoGo, a resilient, full-length layer of biodegradable softness Enjoy enhanced support with the DRB Accel unit, a lightweight TPU system in the midsole that adds torsional rigidity and support Expect flexibility and support with Omega Flex Grooves at the midsole