The brand new Ultima has been updated, this now features U4ic X cushioning to take it to a new level of comfort.U4ic X is a light evolutionary midsole that delivers a more comfortable cushioned ride and higher rebound. Cushioning and lightness deliver the runner with the most comfortable energised ride.The Mizuno Wave is based on biomechanical research into the differences between men's and women's gait. Mizuno constructs the Midsole/Outsole of each gender differently to improve the ride, performance and comfort. A new model with great cushioning and less weight, the Wave features a DynaMotion fit and AP+ midsole.Smooth Ride Engineering provides the ultimate in comfort, feel and performance. Designed by Mizuno's Sozo Studio, Smooth Ride Engineering is the next generation in performance footwear design. Designed to minimise the rapid acceleration and deceleration of the foot through the phases of the running cycle by reducing shock and increasing flexibility. This allows for a supremely comfortable run through a smoother ride.Dynamo Fit was developed by the revolutionary Sozo Studio through analysing high speed video that shows how shoes distort in the collar and heel counter during the gait cycle resulting in loss of fit and causing heel slippage. The DynaMotion Fit system allows the upper of the shoe to interact with the movement of the foot relieving the stress on the upper which causes the distortion and results in fit being maintained throughout the full range of the movement.Intercool technology relieves heat and humidity build up by incorporating a full-length ventilation system in the sole of the shoe allowing for the heat to escape through a system of ventilation channels keeping you cool and dry. This is further bolstered by AIRmesh that allows the shoe to maintain a high standard of breathability providing a cool, dry feel.X-10 provides durability and traction utilising the most durable carbon rubber from Mizuno that allows for longer wear in high impact areas and provides more traction at heel strike.