Mizuno Wave Inspire 9 Women's Running Shoes Wave Midsole - Providing an amazing cushioning to weight ratio. DynamotionFit - Allows the shoes upper to work with your foot, materials and design means that the shoe can twist, bend and stretch. SmoothRide - Ensuring a more fluid enjoyable run, due to Flex grooves in the heel promoting natural movement from the back of your foot to the front. InterCool - A full length ventilation system in the sole, to reduce heat and humidity. AP+ - Increases rebound and bouncier feeling, increasing cushion durability while maintaining lightweight performance.