Rottefella Xcelerator 2.0's unique construction and low weight give you more power and better speed, while the binding's low profile gives you optimal control in the track. With the included NIS key, you can easily put the binding in the desired position and move it forwards or backwards to achieve better grip or better glide. In combination with the Move ™ Switch, you can easily and without taking off your skis, move the binding forward for better grip and backwards for better glide. Xcelerator 2.0 is available for both skate and classic cross-country skiing.