Details When you're ready to take your running to a faster level, the Salomon Sonic RA Pro 2 road shoe combines a highly responsive, dynamic ride with just enough protection for hard surfaces, in a lightweight package built for speed. Upper Road Specific Sensifit: Sensifit system moves naturally with your foot and works to cradle the foot providing a precise and secure fit Welded Upper Ortholite® Impressions provide lightweight memory foam cushion Traditional Lace: Traditional lacing provides the familiarity, adjustability and comfort the runners on the road prefer. Welded Collar Binding Soft Collar Construction Midsole EnergyCell+: EnergyCell+ is a high-rebound midsole compound that provides exceptional energy return while also delivering substantial cushioning and durability. Opal: Opal is a cushioning compound that is inserted in the midsole that provides a soft and comfortable underfoot ride with the benefit of high-rebound. Cushioned and bouncy, the best of both worlds. In addition, Opal is extremely lightweight, durable, and maintains its performance in extreme temperatures. Vibe: Vibe technology is the combination of EnergyCell+, Opal, and unique assembly that work together as a system to attenuate vibrations reducing a potentially harmful load to the body while delivering a responsive ride. Molded EVA Geometric Decoupling: Geometric Decoupling works with the foot allowing smooth and efficient load guidance translating into an effortless and efficient heel to toe transition. Outsole Blown Rubber ContaGrip® Heel N/A Forefoot N/A Offset Heel Stack Height: 24mm Forefoot Stack Height: 18mm Offset: 6mm Width D Weight 6.5 oz (185g) (size 7) Salomon Sonic RA Pro 2 Women's