Atomic Pro C1 is a fast but friendly boot for classic cross-country skiers, particularly if you want a boot to help build confidence and technique. It comes with a mid-cut which provides a little extra ankle support, and an internal heel counter for good support around the back too. It also features a 3D Lacing System that connects with the heel, so as it tightens it wraps the foot perfectly. The Sport Fit is snug but not too narrow, while Live Fit foam inside the boot molds to your foot for an incredibly comfy individual fit. Finally, the boot works with all 2-rail bindings including NNN and Turnamic . A great choice for all athletic cross-country skiers.