Atomic Pro S3 is a cross-country ski with a sportier fit where a good feel and comfort are a major focus. The Pro series is developed for both the regular exerciser and more ambitious skiers who value feel and comfort. The Deb low boot allows your foot to move naturally and riding feels freer. 3D Lacing System means that the heel and lacing are connected so you get a perfect heel grip every time. Split Cuff with 360 degree closing allows the ankle to move naturally while you get extra lateral support.