Womens Mizuno Wave Nirvana 2 Running Shoe FREE SHIPPING TO ALL 50 STATES! Mizuno Wave Technology: SmoothRide Engineered, full-length, three layer Skeleton Wave that provides the utmost in protective cushioning Smooth Ride - engineering approach to minimize the rapid acceleration and deceleration of the foot during transition, creating the smoothest ride possible Upper - Airmesh upper provides the utmost in breathability and comfort of the upper. Mizuno Intercool full-length midsole ventilation system reduces heat and humidity build up inside of the shoe. Weight: 9.8 oz X-10 outsole is the most durable carbon rubber that allows for longer wear in high impact areas and supplements traction in the heel strike. Women's Sizes: B = Standard