ZipFit World Cup liner

Materials / Fit

ZipFit has gone through a few different design iterations over the last few decades, from gel to foam to cork. The current cork design used in all models is a patented mold of a compound called OneMinuteFit (OMFit), a mixture of granulated cork and a ceramic binding adhesive. The compound is fluid at room temperature, but still stiff enough to give you excellent hold and responsiveness in the boot. The compound will mold over time as your boot or foot changes, resulting in a permanent, comfortable, high-performance fit.

The OMFit actually expands slightly (10%) when heated compared to normal cork or foam injections. This in turn provides you with a very tight fit while skiing. This also results in a liner that never “packs out.” People are rumored to have skied 800-1,000 days on one set of liners with no problems. Racers typically go through two or three shells before the liners wear out.

The claim by ZipFit is as follows: “The OMFit is the most resilient, supportive, protective, shock absorbing, heat exchange and insulative material ever devised for boots.” And although I can only compare to my collection of stock liners, I can’t argue with any of these claims at this point.

Initial Fitting / Break-In Process

The initial fitting of the ZipFits was very simple. At The Boot Doctors, we heated up the liner and shell. I put the liner on my foot, slipped into the shell, buckled the boot to medium tightness, and walked out the door to go ski. The liners have the option of injecting additional cork if needed after the initial fit, but my last time in the shop was when I walked out after heating—they fit that good from day one.

That being said, ZipFit claims the liner takes a few days to break in, so expect a very (emphasis on very) tight fit for a day or two. This was true with my experience. My first two days were basically: ski a run, head into the lodge to get out of my boots as quickly as possible, let my feet breathe, repeat.

But following these two break-in days, I have yet to take these boots off again while skiing. And the performance, as mentioned, has greatly improved over my stock liners. I believe this is for two specific reasons:

Precision Fit, Increased Performance

First, the plastic molded asymmetrical tongue with the same OMFit cork as the heel pockets. The fit and responsiveness of this tongue was much improved over the stock Lange liner, with consistent contact from top to bottom on my shin. The ability to drive the liner into the boot shell and get everything that shell was designed for both back into your leg and into the ski is what a liner is designed to do. And the ZipFit does.

Second, the tight fit from heel all the way up to the top of the calf allows full transfer of any movement directly into the boot shell, therefore giving you the instant ability to move the ski how you’d like. Whether it is driving the tip with the fore-aft movement of the shell or the angulation to the side, the initiation is instantaneous and precise when needed. There is no lag or movement, it is quick and precise.

Even four months later, I was still amazed at how tight these are everywhere. Not just no heel movement, or good fit around the calf, or a good toe box—the ZipFits improved the fit from the toe to the top of the calf and everywhere in between. And this is how you end up with a very high-performing liner.

10 comments on “ZipFit World Cup liner”

  1. Imagine all those years of perfect skiing with complete control you could have had……..if you wearent so stubborn about aftermarket liners in the early years….:-)

    • cdub,

      I’m not aware of any place online where ZipFits can be purchased currently, but I sent a note to Sven to see if he had any more info. When I hear back, I’ll let you know. If you haven’t seen it already, here’s the list of ZipFit dealers from the ZipFit website:

    • Here’s the latest from Sven:

      “We have been selling the Zipfit’s on line for 8 years … and it has worked very well. Simply purchase them on-line through Describe the boot model and size and send a check.”

      The exact page is Fill in what you’re looking for in the “Comments or Questions:” box, then send a check to the address listed once they get back with an exact price. Also, as noted in the review, the site will be updated shortly, so this exact process might change, but for now, that’s how it works.

  2. So I purchased some used 26.5s for my 26.5 shells…and they were too small in length. Besides being uncomfortable to wear outside the shell, they curled my toes, making the boot completely unwearable (think crack climbing in bouldering shoes). Unfortunately, the liner has a hard plastic bottom so you can’t really stretch the toe box to get more volume. Granted, I have a tight shell fit and had some punching in the toes, but I’m still surprised because I’ve never heard or read about people having this issue.

    Joe, did you encounter anything like this before your 2-day break-in period? I mean, I have a pretty high pain tolerance, and I had to get them off within minutes—nowhere near enough time to stand in line and ride a chair. (Obviously, this has nothing to do with the OMFit, just the neoprene toe box.)

    I might go try to find a size 27 at my local shop, but I thought I would throw out this warning to potential customers with a tight-fitting shell.

    • I had the opposite feeling. I felt the flexibility and compressibility of the neoprne gave me more room if anything in the forefoot.

      Are you positive both are 26.5? seems like this would only happen if you were a full size off in either the shell or liner. The neoprene toe box seems to be done very nicely on these liners.

      Are there any other differences in the setup? new foot beds, shims, etc?

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