This industry-leading high-end neutral trainer gives a plush, cushioned ride while providing a stable platform. The Nimbus has shaved off 3/4 ounces of its previous weight by removing the external heel counter. This now provides a more comfortable heel collar to wrap around your ankle bone leaving no room for slippage. The assymetrical lace still winds down the natural curve of your bone struture providing a glove-like fit. A new aspect is the AHAR outsole, this material is a thinner and lighter rubber placed evenly on the impact area of the outsole to reduce excessive wear. A Guidance Line is now apparent within this model, which is a vertical flex groove component of IGS to promote flexibilty and a natural gait. For all the ladies a material by the name of Solyte has been injected under the forefoot for improved comfort and cushioning.