K2 Mindbender 110 Alliance

Model Year
All-Mountain Freeride
Last Width
Flex Index
Price (MSRP)
The 2020/2021 K2 Mindbender 110 Alliance is reviewed in the women's All-Mountain Freeride narrow category based on tests at Silver Mountain Resort & Mt. Bachelor Resort by the experts at America's Best Bootfitters, powered by Masterfit Media.

The Gist

With high scores last year for its dialed stance and its convenience, warmth and features kit, testers affirmed that the Mindbender 110 Alliance is a multi-playground master with more throttle response and quick handling than expected for its high level of fit luxury. This season it returns unchanged--its thin shell polyurethane and Pebax keep it light, and testers still love the slick two-position forward lean adjustment on the metal-to-metal hike mode apparatus. This is the roomiest of all women’s narrows, regardless of category, so testers said average feet should not fear this untracked pow reaper that has solid game on firm inbounds surfaces as well.

The Fit

Testers agreed that the Mindbender 110 Alliance is essentially a medium volume boot, though it tapers enough at the base of the lower leg and around the ankles and heel to keep hold of the lower volume foot and leg in those locations. The toebox and forefoot feel is quite roomy, but testers didn't mind the extra space for warm and comfortable touring and all-day no buckle fussing for on-area days. While the lower leg is held firmly, testers mention that there's still plenty of room over the top of the foot.


For a comfortable combination of solid descending skills and a light-enough capable tourer, there aren't many boots that can match the Mindbender. The touring range of motion is legit both forward and backward, with a long and friction-free stride that testers dug. The boot skis as close to a fixed cuff all-mountain ripper as you can get with a hinge feature. Testers drove big skis all over the mountain with this one and all approved.

Cool Features

Using Pebax bio-resin in the cuff shaves weight and takes a little burden off landfills by avoiding typical petroleum based plastic. It's a straightforward four-buckle overlap affair otherwise, with GripWalk soles and a slick cam-buckle release on the power strap (stolen from Dynafit, but still cool).

Sizes (MP) 
Hike Mode 
Boot width profile 
Also in this Collection 
Mindbender 90 Alliance, $650
Cantology Compatible 
Shell/Cuff/Tongue Plastic 
polyurethane/Pebax bioresin/n.a.
Tech Compatible 


  • “Liner and shell mold worked wonders. Instep pressure is gone, heel is locked and loaded, and the cuff of the liner has a really nice wrap. All things I was wanting. K2’s customization process works. ” -- Emily Poore
  • “Feature rich and functional. Comfy without being all furry and prissy. Rolling edge to edge is super quick and intuitive in this boot. Really felt like I could give it full gas and it would hold. ” -- Megen Johnson
  • “Very impressive power to edge for this type of boot. Fast to inside edges, it loses a bit of that to the lateral side due to high, roomy instep but still very impressive. This boot is a super-skiing very hikeable hike mode boot. I could see this being a perfect one boot quiver for the resort skier who pulls out a hike occasionally and wants performance in both areas. This boot wins for best skiing and hiking in all widths. Others do one or the other marginally well. This is above average in both criteria. ” --


  • “Very upright and kinda hard to flex. Strange fit--absolutely massive toe box and the Achilles is super tight. ” -- Kori Coggin

This boot available at...

Ellicottville, NY
Warren, VT
Killington, VT
Pagosa Springs, CO
Revelstoke, BC

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