Mizuno Wave Inspire 12 Women's Running Shoes - SS16 U4iC - A lightweight midsole compound delivers effective cushioning through a format that is 30% lighter than the previous AP+ midsole technology. u4icX - Lighter and more cushioned iteration of U4iC. Smooth Ride - Smoothride components have been added to maximise the energy transition from heel to forefoot, encouraging a smoother step and improved performance. Air Mesh Upper - Allows air to permeate the exterior, providing breathability. DynaMotion Fit - Through extensive research, Mizuno have discovered that traditional footwear distorts in the collar and heel during the gait cycle, resulting in heel slippage and a poor fit. This technology relieves the stress the foot naturally places on footwear, thereby eliminating discomfort for a perfect fit.