The Atomic Pro S3 strikes that balance of being precise but also comfortable for hours on track. For precision, the 3D Lacing System connects with the heel to wrap the foot perfectly. Dissociated Lacing means you can tighten the top and bottom of your laces separately for perfect hold. While a Split Cuff with 360° Closing allows your ankle to move naturally while still supported. For comfort, a water-repellent Aero Membrane on the top half keeps you cool and dry.