I know many are interested about these boots (I was too) so here we go :)
So far I have only one day on these boots and that's why I am giving only 4-4.5 stars as I cannot speak about durability yet.
Here's what I can tell you already:
My first day was a full-on backcountry skiing in our Canadian Coast Mountains - about 7500f and about 7h (with a descent off a peak - true ski mountaineering conditions). I had them on my feet for about 1h the day before to figure out how they fit.
No question these are snug boots, although, the liner gave in after about 2-3h of touring. The forefoot width feels about the same as TLT6 (maybe 1-2mm narrower), but they are lower in height in the front part and over the top of the foot - that suits my feet well.
Note, that sizing is a bit "off" and you will likely need to size-up 0.5-1 size. However, this is only on paper because my TLT6 are 28 and 307mm while with Procline I had to go 28.5 but the shell is 305mm.
Probably negligible weight increase compared to TLT6 but absolutely not noticeable once on your feet.
I am impressed with the way these walk. Very smooth whether on skins or bootpacking.
I put in a green Superfeet insole from my TLT6 and it spread the liner a bit wider.
Overall, very resistance-free and nimble feeling walking/skinning in these.
I knew they would walk well, after all it's Arcteryx, but I wondered about skiing. In 4 runs I skied everything from very wind blasted to breakable snow a glacier, to high alpine skiing off a peak, and tree skiing lower down - I couldn't tell a difference compare to TLT6 except the Procline liner feels to have better support higher up.
Skiing steep (around 45 degrees) slopes felt very solid, hence, I wouldn't take a boot up such terrain on a first day if I didn't feel it was good enough.
All the buckles, their positioning and tension do a great job adjusting pressure and lock you in.
I skied them on Atomic Backland 78 176cm.
Overall, I believe everyone would like how they ski. Of course, these are not for hucking big jumps but they will skiing anything (even drive a bigger ski than I had) and exactly what they are intended for.
Random thoughts and observations:
- Getting into the boot and out is little more demanding than TLT6.
- The whole system of buckles was a bit daunting to me but after about 3h I was as efficient as with other boots. So it's just a matter of getting used to the boot.
- I used the thinnest socks I have because the full gaiter looked warm (and I don't get cold on my feet) but I think it will be just fine for majority of people, and for women for sure.
- I popped my old TLT6 liner in just to see how it feels since the shell length is almost identical, and they felt very much like TLT6 :) So if you find any reason for not liking the Arcteryx supplied liner then you can swap for your older one.
These won't fit every foot (perhaps like the old TLT5 were a bit narrow for most) but when they do then you won't be disappointed.
I am not commenting on their mountaineering abilities because I did only a short scramble and about 20min boot pack (and they walked as great as mountaineering boots), and then there are much more qualified people to chime in on that ;)
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