Mizuno Wave Rider 15 Running Shoes *UPDATED* Mizuno Dual Fan Wave Plate - The Dual Fan Wave Plate in the Inspire 8 has been a *NEW* Smoothride Flex Controllers - New Smoothride components have been added to make the *NEW* AP+ (Acceleration Polymer) Midsole - Lighter, more durable midsole compound that inc *UPDATED* Heel Construction - The back heel edge has been moved forward by 4mm to accommod Gender Engineering - This shoe is gender specific to women.Research carried out by Mizuno