Got the expert straps (3 elastic bands) as open box item elsewhere in town to use on Fischer Travers CS instead of the Voile straps I usually use (tried both normal and XL.)
Drilled the cuff in the center with 1/4” bit. Used one of the nuts that normally dig into the interior plastic on the outside facing the strap because the cuff is thinner than normal alpine boots these are used on. Trimmed the little spikes down on the nuts with pliers. You can’t feel the screw head and washer on the inside with hardware flipped this way even with the flimsy stock liner. Pretty easy; the plastic drills nicely.
Results after MCC road test:
-Helps boot ski better, but still not like a big boot (no surprise.)
-More convenient than using a Voile strap as a power strap (better transitions.)
-Easier to get tension correct/comfortable. (Felt like I was always over-tensioning Voile straps before.)
Booster Straps
The basic premise behind Booster Straps is simple: your boots are designed to flex forward, why shouldn’t your power straps naturally allow that? Most stock power straps are constructed of static materials that have no capacity to turn your forward motion into energy. Booster Straps instead use a sturdy elastic band that provides progressive feedback the more you pressure your boots.
It turns out this improves the performance of ski boots almost universally, making them much more responsive to the input they receive from you, and producing more power as a result. First used by World Cup Ski Racers to gain a competitive edge, Booster Straps were also found to eliminate “shin bang” experienced by park skiers and freeriders, and are now used by many skiers to improve their day-to-day skiing.
Here at Skimo Co, we’re fans of this technology, and we think there’s further potential in the world of touring beyond simply adding or replacing the power strap on your current boots. A Booster Strap could be used as a field fix for a blown buckle (no offense, Voile Straps) and we’re intrigued by the possibility of a full-on cuff buckle replacement in leaner boots like the Fischer Travers CS, Scarpa F1, Salomon MTN Summit, and others. We’re excited to see and hear how you use your Booster Straps!
Booster provides additional information on installation and usage on their website. Please refer to the following chart to choose a model. If you are between models, Booster recommends opting for stiffer.
The following table lists weights for each model. Weight is per strap, not per pair.
| Model | Weight |
|---|---|
| Intermediate | 65g |
| Expert | 73g |
| World Cup | 75g |
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Questions & Reviews
Comment on this review:
12/13/2025
Will the Expert Booster Strap work with the 2024-25 season Salomon Shift Alpha Boa 120 boot?
The velcro strap on the stock boot is not very user friendly.
Also, does the strap come with the mounting hardware or do you have to get screws & washers separately?
The velcro strap on the stock boot is not very user friendly.
Also, does the strap come with the mounting hardware or do you have to get screws & washers separately?
12/13/2025
Hey Gerry,
Unfortunately, we don't carry this boot, so I can't double-check. However, I did look at the boot online, and it looks like the stock power strap may be riveted on, so you would have to drill those rivets out and potentially drill holes in the cuff for the booster. Also, the Booster strap is meant to use the screws from the boot, so it doesn't come with any. You can add one, but it may take some creative solutions that will likely void your warranty on the boot!
If you have any additional questions, you can email us at help@skimo.co!
Unfortunately, we don't carry this boot, so I can't double-check. However, I did look at the boot online, and it looks like the stock power strap may be riveted on, so you would have to drill those rivets out and potentially drill holes in the cuff for the booster. Also, the Booster strap is meant to use the screws from the boot, so it doesn't come with any. You can add one, but it may take some creative solutions that will likely void your warranty on the boot!
If you have any additional questions, you can email us at help@skimo.co!
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6/2/2025
I have a pair of mezallama's they are great on the way up, but I would like to improve the ride on the way down...any option for a power strap to increase the stiffness of the boot?
6/3/2025
Hi Rick,
You have enough room to physically add a power strap on the rear of the upper cuff. You will of course need to drill holes for it, voiding your warranty, etc. However, the power strap will almost certainly sit on the top of the liner rather than the shell. So, I think it would be best to first upgrade the liner in the boot to something taller, with more support than the stock liner. This is probably also a performance upgrade on the downhill. A Palau Tour Lite Evo LV would work well. I would try it with the new liner first - you may find that this adds enough support on the downhill that you don't need to do anything else.
You have enough room to physically add a power strap on the rear of the upper cuff. You will of course need to drill holes for it, voiding your warranty, etc. However, the power strap will almost certainly sit on the top of the liner rather than the shell. So, I think it would be best to first upgrade the liner in the boot to something taller, with more support than the stock liner. This is probably also a performance upgrade on the downhill. A Palau Tour Lite Evo LV would work well. I would try it with the new liner first - you may find that this adds enough support on the downhill that you don't need to do anything else.
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6/10/2024
To be used with a Dynafit radical pro I’m assuming you would have to remove the Velcro strap?
6/10/2024
David, If you change the existing Power strap on the Radical Pro, it will no longer be integrated to the Ski Walk lever. Which is a sweet feature of that boot.
3/18/2025
Do all of the versions fit on the Dynafit TLT X (which has both that narrower upper power strap and the main buckle strap integrated to Ski Walk lever...I'd just be replacing the upper power strap with this)
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3/19/2024
Do you guys have any experience replacing all cuff buckle straps (both cuff cam buckle and the stock power strap) with Booster straps on light touring class boots (Scarpa F1 LT, Technica Zero G Peak, etc)? I replaced the upper power strap on my F1 LT's with an expert booster this season and definitely have felt the gains in progressivity have been worth the minor weight penalty. A little leery of taking off the main cam buckle (and just running the Booster strap) as it covers so much surface area on the front of the boot. Whats your guys experience?
3/20/2024
Hi Brendan,
That isn't something we've tried! Not sure I would recommend it. The idea with the booster strap is to add some progressiveness at the top of the boot, to allow you to flex into it a bit more, but you still have the support of the rigid buckle underneath which locks your leg/ankle into the boot. Making that part stretchy as well might yield a bit too much stretch/flex in a way that could be undesirable. But you could certainly try it! If you did do that, I would definitely want the stiffest possible booster model for the main strap.
That isn't something we've tried! Not sure I would recommend it. The idea with the booster strap is to add some progressiveness at the top of the boot, to allow you to flex into it a bit more, but you still have the support of the rigid buckle underneath which locks your leg/ankle into the boot. Making that part stretchy as well might yield a bit too much stretch/flex in a way that could be undesirable. But you could certainly try it! If you did do that, I would definitely want the stiffest possible booster model for the main strap.
6/10/2024
I’m assuming to be used on the Dynafit radical pro you’d have to remove the Velcro strap?
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