The Rossignol Control Step-In Cross Country Ski Bindings are only compatible amongst existing NNN® and Prolink® boot soles. Featuring an easy automatic step-in with manual release step-out design along with an easy, tool free adjustability for the fore and aft allowing for a custom fit performance depending on the snow conditions. The Rossignol Control Step-In Cross Country Ski Bindings are an easy to use binding designed for recreational off-trail skiers.