Mizuno Running - Wave Nirvana (White/Melon/Navy) - Women's: Created for the runner with medium, flexible arches seeking maximum support and unsurpassed cushioning. 25mm/13mm (heel to forefoot ratio). Contains Double-Fan Shaped Wave Technology that provides support from initial impact through toe-off by using a full-length Pebax wave in a fan-shaped configuration on the medial side of the shoe. Initial impact cushioning and transition through the gait cycle are enhanced by the inclusion of a full-length rubber wave on the lateral side. SensorPoint midsole creates better support and durability. X-10 Airmesh in the heel provides solid durability. Solid rubber outsole and blown rubber in the forefoot allows for further durability and flexibility. Shoe weighs 11.0 oz.