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Size chart

Sizing notes

For rock climbing shoes: Choose soft shoes two to three sizes smaller than your street shoe size. We recommend you fit your trad shoes one to two sizes under your street shoe size. Remember to factor in stretch. Unlined slip-lasted shoes tend to stretch about one full size. Lined shoes stretch about a half size. Remember: a well-fit comfortable shoe will work better than an ill-fitting tighter shoe.

For boots: Add one half size to your street shoe size. You should be able to slip one finger behind your heel when you are standing up with the boot unlaced and your toes touching the front. If the boot is too short, your toes will get smashed walking downhill. Too long and your heel will slide up and down and give you blisters.


Rated 4 out of 5 by from Climbs great but runs cold This boot is comfortable and light. The rigidity of the boot also means that it climbs great! I have no complaints on hiking or technical climbing performance. My only problem with this boot is that it runs quite cold. In Ouray, my feet were getting cold even though it was 35+ outside. Warmth seemed to drain through the soles into the ice. When I got back to the northeast I took out the filmsy insole they came with and put in the superfeet redhots. This improved the warmth considerably. Still not great, but I would be willing to tackle conventional alpine if I expected say 15+ temperatures. Overall I am happy with them but wish they were warmer. A note on sizing for those ordering: I have narrow feet and so la sportiva products in general work well for me. Size 46 fit me great. I also wear 46 in La sportiva's trail running shoes. In men's US dress shoes, I tend to wear about and 11-11.5. Hiking boots of other brands are variable for me. I might wear anything from an 11.5 - 13US.
Date published: 2015-02-13
Rated 3 out of 5 by from Rainier Bought and returned after an extensive (failed) trial period. Buy a half size or more larger than your regular boot. My complaints are... they ran COLD. It was not uncommon to loose the feeling in my toes on peaks (Mt Washington, Eleanor, Rose, Stone (Lake of the Angels), Adams, Hood, and finally Rainier (DC)). Second concern was I could not seem to find a working combination of socks and liners to avoid heel burn. Eventually I started to tape my heels before heading out. Third complaint is they wear out quickly. Crampons beat up the edge and the tread wore quickly likely due to traversing exposed stone (...think Enchantments). I have nothing to compare these to so I supposed you can take my experience with a grain of salt (Despite a friend in AK having a very similar experience). In other news... they lace up nice, have a tongue insert for those feet, and have a good balance of rigidity and stiffness. They pointed well in everything in all conditions. They'll help you look the part! I'll try a different boot for this years attempts. I never thought to try an insert... a valid point.
Date published: 2016-04-21
Rated 3 out of 5 by from Sturdy but blisters! I recently hiked Mt Rainer with a pair of used 43, I usually wear a size 10 running shoe. They were sturdy and had great ankle support but my toes were cold, it was about 15-20 degrees F, I wore two layers of socks, medium and light. My heels got nasty blisters in the first 30 minutes. I adjusted the laces and tongue but still had heel burn. Going up and coming down Rainier I got hammer toe trying to kick in steps and trying not slide down the mountain. These boots did not fit my feet well, maybe they fit others better.
Date published: 2017-09-04
Rated 4 out of 5 by from Perfect fit but does run cold This boot fits amazing. Requires virtually zero break in period. I got a true to size and I had zero complaints on the comfort. It does run a bit cold. Took these up Mt. Rainier and my toes almost froze off in conditions that were not that bad. I may trade in for the Baruntse's.
Date published: 2017-09-11
Rated 5 out of 5 by from Nepal Cube GTX This is a VERY nice boot. the quality of the boot is obvious when you first open the box. I have not used them yet, but they feel great on the feet, really lock them into place, in a comfortable manner. For sizing I usually wear 11.5 - 12 , and I got a 46, which is 12.5 or something. I would not have wanted to go any smaller, but I do have wider feet. Anyway, as of now I say they are worth the big bucks, we will see how they perform. Im expecting greatness.
Date published: 2014-08-07
Rated 5 out of 5 by from Love La Sportiva I've been using Trango Cube and Makalu boots for 10+ years. I got these for NE winter boots, the Makalu get cold below 20F. These fit better, are lighter and almost as nimble as the Makalu. The sole is really stiff. I'm size 12 and bought 47/13 and fit is great. Normally I buy the other boots in 46.5 which is good, but I can get some toe bang kicking a rock. Not too hot wearing around the house or in moderate 30F temps.
Date published: 2018-01-17
Rated 5 out of 5 by from Amazing boot. I bought this boot more moderate ice climbing in Alaskan winters. I've used them about 10 times and in temperatures down to -5 degrees F. I've had warm toes the whole time. These boots paired amazingly with the Petzl leverlock crampon.
Date published: 2018-01-31
Rated 5 out of 5 by from Unbelievably comfortable Best boots I've ever climbed ice in. Super comfortable on the approach. Excellent fit. No blisters even on the first several mile "break-in" period. Retain crampons with no issues. Excellent--wish I bought them years ago!!
Date published: 2018-01-30
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Questions & Answers

What crampons would you recommend for general mountaineering with these boots?

Asked by: Fred
Any crampons will work with these boots, but Step-in / fully automatic (wire bail in front, lever lock in back) will go on easiest and be most secure. For general mountaineering, I think classic 12-point crampons with horizontal front points are best- Petzl Vasak, Grivel G12, or Black Diamond Sabretooth are all good options (BD crampons are stainless steel, which is more rust resistant but won't hold a sharp edge as long, so it's a tradeoff). The Snaggletooth mentioned above is a more specialized option (which happens to cost $35 more for no good reason), that might be good depending on how you'll use it.
Answered by: AnswerMan
Date published: 2018-01-21

Help! I really want to love these boots, but I keep getting bad blisters on the heels. I have worn them on several hikes trying to break them in. Probably totalling 50+ miles. What am I doing wrong? Too tight? Too loose? Wimpy feet?

Asked by: RSeitz
Use Engo patches inside and attached to the liner of the boots in areas of friction that are having blisters form. You’ll be amazed at the results. 
Answered by: Punkrockpat
Date published: 2018-01-21

I'm looking at boots for Rainier and general ice climbing in the NE. I'm thinking about either the Mont Blanc Pro GTX or the Sportiva Nepal Cube GTX. Trying them on they both felt good. Are there any major differences that I'm missin? They seem comparable

Asked by: Tom24
The Nepal Cube and the Mont Blanc are very comparable. The Nepal Cubes have a lower volume fit and a removable, adjustable variable-fit tongue. The top of the cuff of the Mont Blancs are a little more flexible for descending and snow field approaches.
Answered by: REIservice
Date published: 2017-07-16

What size of US 8 for that. Thanks

Asked by: Marslan
The smallest size REI carries in this model is a 41, which is equal to a US 8.5. A REI store may be able to special order a 40.5 (US 8) for you:
Answered by: REIservice
Date published: 2015-09-20

Is there any actual documentation on how to use the Tongue system? This does not appear entirely intuitive to me

Asked by: Da Lead Bear
To use this system, you simply pull to adjust both vertically and horizontally to how you would like the tongue to rest on your foot. If you have additional questions, please contact us:
Answered by: REIservice
Date published: 2017-07-14
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