The entire middle and inner sole consists of Saucony's best PWRRUN+ foam. A lighter and more shock-absorbing material than previous shock-absorbing materials. The resilient material also provides an incredibly high energy reproduction. The unique FORMFIT fit creates an optimal and individually enveloping fit around the entire foot. From above, the foot is hugged in a comfortable and stable way with the help of a malleable, seamless and well-ventilated mesh, which is combined with an integrated lacing system. The upper part also consists of recycled material.