New to the North Face collection this season, the Women's Single-Track Hayasa II (A1B4) is a sure bet when it comes to running long distances in variable terrain. The Single-Track Hayasa II is where breath-ability and comfort collide in a super-light shoe. The uppers are completely seamless, breathable mesh and feature reflective tape. The foot bed is perforated EVA Nothotic with Cradle technology for proper foot positioning. The mid-sole is made from compressible molded EVA with Pebax foam inserts in the forefoot and heal for super-lightweight cushioning. The shoe features blown rubber forefoot pods for lightweight durability and Tenacious Grip rubber on perimeter lugs for traction.