When the best simply isn’t good enough. Madshus, the world-renowned Nordic ski brand has teamed up with K2 Skates to bring endurance athletes the next evolution in lightweight, high-speed marathon skates. Introducing the NEW Redline 110, featuring a brand new anatomical and supportive chassis. The lightweight Redline carbon cuff and base – both modeled after the legendary shape and fit of the Madshus Redline ski boot - offer support and strength for your stride with an increased range of motion. Unparalleled comfort is achieved with the ventilated microfiber upper which is light, firm and snug with pre-formed high ankle support, 4 zones of macro closure and standard lace for infinite customizability. Finally, the Redline 110 features four of our NEW 110mm Flash Disc wheels – ultra high energy urethane with aerodynamic disc hubs you have to see, feel and hear to believe. The Redline 110 is truly a force to be reckoned with.**For unisex skates, US sizing is in men’s. SKATE FEATURES: Ventilated Microfiber. SKATE LACING: Traditional Lacing. SKATE CATEGORY: Marathon. SKATE WHEEL SIZE: 110 mm. Redline Removable Carbon Cuff. Redline Carbon Base. Extruded 6061 Aluminum Frame. 110mm/85A Wheels. ILQ-9 Pro Bearing. The Original Softboot.