Lange SX 100 Ski Boot

A whole new world of Lange.

Who made this black and red abomination, stamped "Lange" on the side, and tried to pass it off as one of the legendary blue shoes? Shame on you! Really, though, it is actually an honest-to-godness Lange, but it's easy to be fooled by the red-and-black color scheme of the new SX 100 Men's Ski Boot; we checked it out, though, and it's real. Perhaps the new looks even make sense, because the SX 100 is a departure from the race-hungry Langes of yesteryear. It's wider, softer, and more forgiving, so intermediate level skiers can enjoy the legendary performance without worrying that their feet will actually fall off during a day on the hill.

Unlike the seriously stiff blues that made Lange famous, the SX 90 is a gentler, friendler beast, with a comfortable 102mm last that won't squeeze your feet to death, a soft instep insert that makes slipping your boots on and off breezy, and killer liners that keep your toes toasty from your first morning groomer to the last tree run of the day. It sports a once-piece collar for a killer fit around the calf, and Ultra Grip soles that make harrowing parking-lot traverses and icy stair descents a little less terrifying.

Lange wasn't about to opt for comfort at the cost of performance, though. The SX 90 features the same mono-injected construction as top-end Langes, because it provides the smoothest and most consistent flex in a variety of temperatures, and features the same lock-down four-buckle design that serves up the bombproof control that made Lange famous (the top buckle also features a highly adjustable Quickmacro ratchet adjustment for a personalized upper-leg fit). Inside the shell, the Thermofit RL3 heat-moldable liner will conform precisely to your foot for a snug, pressure-free fit and the Power Wrap Tongue+ will pass precise input into the shell, so you can cruise groomers, surf cold smoke, and zip through the trees from the first bell 'til the last.

  • Mono-injected material
  • Soft instep insert
  • Thermofit RL2 heat-moldable liner
  • Power Wrap Tongue+
  • XL aluminum buckles with upper Quickmacro Ratchet adjustment
  • One-piece collar
  • Ultra Grip soles
  • Reviews
  • Q & A

Great Gift

  • Familiarity: I gave it as a gift but have feedback to share

I bought these as a gift and they have been well received. They fit snug and are comfortable.


  • Familiarity: I gave it as a gift but have feedback to share

Person who received it said that they are great boots.

How long is the boot length for the 26.5 size? I have Marker F12 Large binding, that fits boot length 305 and up? want to make sure this boot isnt too small for this set up.

Hi Christopher, The BSL on the Lange SX 100 in size 26.5 is 306mm. I would go with the small binding as it will accommodate up to a 325mm BSL. If you have any other questions, please feel free to reach out to me directly. - Matthew Pizza - Expert Gearhead


  • Familiarity: I gave it as a gift but have feedback to share

I bought these for my pa, he has been in the same ski boots since I can remember and this year the clips started to break. He was a long distance runner in his past life and his knees are starting to give him trouble so I wanted to find a boot that he can slip on and off easily, and will treat his knees well on the slopes. He just had them thermo molded to his foot last week and says they are really comfy, but has yet to take them for a test drive. Will update when I hear back from him!