Ski bindings attach the front part of your ski boots to your skis. It’s not like other skis and ski boots where the whole boot is attached to the ski. The heel is free and this is what allows you to cross country ski. Your boot’s toe part is usually attached using a lever that locks the boot in place. This ensures it won’t detach at any time.

SNS, NNN, and three-pin are the three different styles of cross country ski bindings. Of those, SNS and NNN are the only types you’ll actually see on the mountain because three-pin styles are old-school and outdated. Both SNS and NNN bindings can work for all ability levels and function in various terrains and conditions.