K2 B.F.C. W 90

Model Year
All-Mountain Walk
Last Width
Flex Index
Price (MSRP)

The 2019/2020 K2 B.F.C. W 90 was tested in the women's All-Mountain Walk wide category at Silver Mountain Resort by the experts at America's Best Bootfitters, powered by Masterfit.

The Gist

Many testers rated the fit of the top-shelf B.F.C. W 90 in 5’s across the board (that’s the roomiest score possible) and another’s fit commentary was one word: huge. Another tester, discussing the initial fit and feel said, put this boot on and try not to smile—I dare ya! This one’s big for sure, rating most room in almost every fit parameter except the ankle and heel where testers said there was a little more retention. They also said it skied head and shoulders above their expectations—sleeper slippers.

The Fit

The fit is so oversized that testers wrote warnings on their test forms that only truly wide, high-volume feet need apply, but they also had no hotspot complaints or shape concerns—it was foot-like in its shape, as best they could tell. The entry and exit is worth mentioning here—as easy as it gets (and pop the walk mode and it gets even easier). One tester claimed she could put it on with no hands and with all the buckles still done up. Flex feel was even and comfortable they said, and they agreed that the calf is comfortable here—even a grown-up cow's worth of leg shaft would be at home, they figured.


Testers were shocked at how well the B.F.C. W 90 wide load rode—the stiffness was on-target, the stance angles were neutral and enabled athletic movements, the edge power was solid and the quickness was there (if you could fill up the space with foot). Testers got aggro' with the Built For Comfort and found that, apparently, it was built for crushing it too.

Cool Features

The Apres Mode (that's what K2 calls it) walk feature is adopted from the other more serious hikers in the K2 boot line, but if nothing else, K2 knows its target customer. This cuff release mechanism is all about strolling parking lots, tailgating, beers at lunch (maybe breakfast too), and its ease of use and range of motion is fantastic, testers said. GripWalk soles can be purchased to make the strolling even more sublime (if you have an appropriate GripWalk binding). The B.F.C. W 90's Convenience, Warmth & Features score was a perfect 5.0.

Sizes (MP) 
Hike Mode 
Heat Moldable Liner 
Boot width profile 
Also in this Collection 
B.F.C. W 90 Heat, $700; B.F.C. W 90 GripWalk, $550; B.F.C. W 90, $500; B.F.C. W 80 GripWalk, $450; B.F.C. W 80, $400; B.F.C. W 70 GripWalk, $400; B.F.C. W 70, $350
Cantology Compatible 
Total Avg Score 
Anatomical Fit and Initial Feel 
Dynamic Balance 
Edge Power & Fore-Aft Support 
Quickness, Steering & Feel 
Convenience, Warmth & Features 
Tech Compatible 


  • “Great, generous fit straight out of the box. I could have skied this boot for a solid few hours without needing any fitting. Toasted marshmallows! So comfy--bring me a delicious, warm cocktail while I wear these please! Easy skiing, great performer on blue square off-piste terrain.” -- Melodie Buell
  • “Very large, plush boot--would fit everyone except the skinny foot. Soft in every direction but somehow it got you back to an athletic stance after every turn. If every rental boot fit and skied this well we'd keep more folks in the sport!” -- Liz Elling
  • “Skiers beware! When you put this boot on you're not going to want to take it off! It is literally the most comfortable boot I have ever put on. With that said, you need a whole lot of foot, ankle, cankle, and calf to fill it. As long as you have the foot to fill it, this boot will not hesitate to initiate the turn. Fits like a supportive UGG.” -- Emily Poore


  • “Slowish response time--steering isn't real precise.” -- Melodie Buell

This boot available at...

Houston, TX
Mammoth Lakes, CA
Revelstoke, BC
Pagosa Springs, CO
Westwood, NJ

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