A revolutionary product for the ultra-trail world from La Sportiva. The new XFlow foam has been designed for maximum cushioning and energy return - mile after mile. Every detail has been carefully considered to meet the needs of the most demanding ultrarunners: the large toe cap and breathable upper ensure comfort even after hours of running, the Wrapping System construction and perfect heel ergonomics provide stability and protection, while the rocker geometry supports a smooth and progressive stride on any terrain. The Wrapping System construction wraps and secures the foot well, preventing it from slipping inside the shoe. Rolling and stability are enhanced by the Progressive Rocker and the wide footbed. The XFlow midsole is made from supercritical foam with exceptional cushioning properties and springy energy return.