The Rottefella Xcelerator 2.0 Skate has a unique construction and low weight. This gives more power and better speed, while the binding's low profile gives you optimal control on the trail. With the included NIS key, you can easily move the binding into the desired position; forwards for better control or backwards for better flow. 
The binding comes with a medium flex that can easily be changed to a harder or softer flex. Flexen is a flexible cushion that provides bending resistance and contributes to better control on the skis. Rottefella Xcelerator 2.0 Skate fits skate skis with NIS mounting plate.