The design and shape of the product are based on the concept of a perfect fit and maximum comfort: the upper part, thanks to the stretch effect, is flexible in adapting to any kind of foot type, while guaranteeing the right level of stability when the wearer is standing. The Dynergy sole is instead designed to absorb the shock with each step taken, thanks to the grained design of the sole, which favours perfect adherence to any kind of surface. With Fusion 4, the technical characteristics of the sportiest shoes are transferred to a fashionable women’s shoe, resulting in the highest possible performance united with a trendy image.