Here's what other sites are saying:
Mount the Salomon SNS(R) XA(R) Manual backcountry ski bindings on a pair of metal edge skis and enjoy the quiet solitude of an untracked snowy slopes.
The Salomon SNS XA Manual binding is the reference backcountry touring binding by which all others are judged. In production for many years, this binding has a respected durability record. OMC use this binding in a rental system for nearly 15 years, with no failures Manual operation does mean you have to bend over to open/close, but the benefit is a tight boot/binding connection and a high resistance to freezing up Be aware that the name has several aliases over the years- X-ADV Raid, XADV Manual, aka SNS-BC. The binding is the same Compatible with X-ADV boots, and older SNS-BC boots. Internal construction is beefy, but all metal-to-metal parts that need to slide are augmented with a plastic face to eliminate the freezing shut or open issues with experienced with competitive designs
Take the path of more resistance with the Salomon SNS XA Manual Backcountry Binding with a wider platform for better power transmission in soft snow. Natural-feeling flex and maximum contact underfoot means indefatigable power through the untracked. Sure, backcountry skiing isn't as fast-paced as in-track skating, but with all that glorious snow and solitude, you wouldn't want it to be.
Salomon SNS X-Adventure Access
Salomon SNS Wedge 60
Salomon SNS XADV Access
Salomon SNS Interface Adapter
Rottefella NNN BC Magnum
Rottefella NNN BC Manual
Rossignol F4 Skate NIS
Rottefella Exercise Binding