It uses a tight fitting upper, structured in 3 layers that provides, from the inside out: comfort, thanks to the seamless construction, flexibility and structure thanks to the innovative MicroLite Skeleton™ application that follows the movement of the foot in a dynamic way while running, protection thanks to the Flex-Guard™ structural applications in microfibre that guarantee a lightweight boot but at the same time provide protection against possible abrasions running between rocks and roots. The exceptional stability is provided by the TrailCage System™ technology that is placed between the two layers of the uppers and provides structure and a snug fit integrating with the lacing system. The outsole developed by the La Sportiva R & D department uses the FriXion XT tread with Impact Brake System and the exclusive design with Trail Rocker technology that promotes natural outer heel, inner toe support of the foot when running. Shock absorption, protection and comfort, 3 sides of a perfect geometry: the origami, which inspired the overall shoe design. With Akyra racing is an art.