Surefoot sells a number of brands of boots, including their own -- which are Lange shells with Surefoot liners.
FYI. My experience with Surefoot's fitting was terrible (though it ended well).
Surefoot did my bootfitting services for a number of years. The full boat -- new boots, custom orthotics, extensive fitting work, foam tongue then foam liner. The results were horrible. Although my boots skied well, I went from some cramping after a few hours of skiing to more and more pain, until finally my feet would start to spasm almost immediately upon putting my boots on.
Worked with a number of Surefoot bootfitters and shops, too, so it wasn't just one lousy individual or shop.
Ended well, though. I took a deep breath and exercised their 100% guarantee -- got a refund on the boots and all the fitting services.
PS Since then I've worked with some great bootfitters with good success. Most of them say that, although Surefoot is a great sales machine, they don't keep up with fitting developments.
PPS One final shot at Surefoot (you may have picked up that I don't think they know what they're doing). Surefoot uses fairly rigid footbeds that inhibit the small balancing movements in the ankle, at the bottom of the kinetic chain. If you can't articulate the ankle, you're forced into bigger movements higher up the chain -- which works against optimal balance and control.