Asolo Fission GV Hiking Boots

Priced: $240.00 Rated:   - 5 stars out of 5 by 23 reviews.
Asolo Fission GV Hiking Boots
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Color: Crocodile Stone
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Asolo Fission GV Hiking Boots -

Exclusive to REI in the US, the Asolo Fission GV women's hiking boots deliver Gore-Tex® protection in a lightweight platform that excells on day hikes and weekend backpacking jaunts.



  • Molded EVA midsoles offer lightweight shock absorption and cushioning for all-day comfort


  • Water-resistant suede leather is paired with tough, high-tenacity nylon to ensure that the uppers are durable and flexible, offering good support and breathability
  • Wicking nylon linings quickly pull excess moisture away from feet for enhanced comfort


  • Gusseted scree tongues and padded ankle cuffs add protective comfort at ankles; rubber toe bumpers protect against impact and abrasion

Weather and Wind:

  • GORE-TEX® waterproof liners let feet breathe while protecting them from the elements, keeping them dry and comfortable

Traction and Grip:

  • Vibram® rubber outsoles on the Asolo Fission GV hiking boots feature a tread pattern optimized for grip on descents and good forefoot protection and grip


  • Thermoplastic urethane plates provide torsional stability while protecting feet from stone bruising
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Average Price History: Price History
Review RatingNumber of Reviews
Average footwear weight (pair):1 lbs. 15 oz.
Footwear closure:Lace-up
Footwear height:Over-the-ankle
Lining:Gore-Tex waterproof breathable membrane/nylon
Outsole:Vibram rubber
Support:Thermoplastic urethane plate
Upper:Suede leather/high tenacity nylon
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Asolo Fission GV Hiking Boots Reviews:

Positive Reviews:

Finally ... it fits.

I have been shopping for a sturdy, comfortable hiking boot for over six months. The search has been exhaustive and exhausting. My husband and I planned a hiking trip in Yosemite. These are the boots I am taking with me. We plan to day hike everyday of our trip and have even procured a permit to hike the summit of Half Dome. I need a reliable boot and I believe this is it ... FINALLY. I've taken them on rugged day hikes ranging in length from 4 to 11 miles in the southern Appalachians to break them in, although I don't think they needed much of a "break-in". They were comfortable right out of the box and they are a great looking boot! I don't much care what boots look like if they fit but what a perk it is. The lacing system is good. I do make some adjustments from ascent to descent but that's pretty standard. The upper material is very water resistant. Even when I rinsed them off after a hike, water rolled right off the surface. The traction is outstanding. But the final two BEST points for me to make are 1) I didn't get any blisters! And I always get blisters. 2) These boots work on my VERY narrow feet and heels. Every other boot I've tried for this trip was too wide somewhere, somehow. The only complaint I have is I wish there was a little more cushioning in the forefoot area, but I do have extremely sensitive feet. Those with less sensitive feet shouldn't have any problem. I hope to report back with another gleaming review of this boot after our trip to Yosemite. I'm crossing my fingers and hoping these do the job.
Lori Ann at REI on 07/07/2012

Great boots

I had a pair of Asolos that I bought over 10 years ago that I loved. I finally retired them this year, and started looking for a new pair of boots. I tried on a few different brands, but the Asolos fit me the best. They feel a lot like my old boots, but I did get a 1/2 size smaller. It seems like these boots run a little bigger than the others I tried on. My feet are on the narrow side, and the Asolos work well for me. Other brands, like Keen are too wide and never fit right.

I have gone on a few hikes with them, and so far so good. They are light, required no breaking in, and seem to be good in wet conditions. I had to do multiple stream crossings, and at one point my toe went in pretty deep. My feet stayed dry the whole time. I tend to do longer hikes (6+ miles) on rocky terrain, and these boots should give me the support and durability I need.
SarahDC at REI on 01/01/2013

Holding up to heavy use

I've been wearing these for a year as my non-mountaineering hiking boots. So far they have held up well to my heavy use. I do a mix of on-off trail and have even done some rock climbing in them! They breathe reasonably well. I did break them in for a few days before using them on the trail and I have had a few blisters here and there, but overall, I think they are breaking in well as I have noticed fewer blisters over time. AKA, the fit isn't the perfection other reviewers found, but it's good enough given the other pluses of this boot. The insoles provided aren't very comfortable after a few miles, but with a pair of $50 superfeet that's all better. I have crossed streams up to my ankle in them- never a wet foot unless the water comes in the top. The black decorative thingy at the ankle lace bracket is peeling off on booth boots now, but otherwise they look great- and I've put a LOT of miles on them!
suhleenah at REI on 02/02/2013

Comfortable boot with no break in time

These boots are the most comfortable I have used with no break in time and perfect on the islands or in the mountains. I took them for their first hike, nine miles over rough terrain. The were awesome and I was the only one without tired feet later after climbing rocks, rocky edges, creek crossing sand, gravel and even blacktop later in the day. I highly recommend them. I only had a light 30 litre pack on but have since carried a 40 lb pack to the islands with these boots on. I wear one thin sock and one good solid hiking sock. I wear a woman's size 7 regular and purchased these in a 7.5. I think they are perfect. I hate cramped toes, and had none with this fit. I waited a year to buy these, trying on at least six other brands. None even compared to these. Thanks REI and Asolo. I love these boots.
tinaestephens at REI on 05/05/2013

Great Boot

After a month of using this boot I decided it was time for the review as I had not seen any on this newer product. I had previously used the Asolo Stynger as my boot of choice for the past 5 years. I wear out a pair a year, as I hike a lot. I was interested in these new boots as they are a pound lighter than the Stynger. They are GREAT for daily hikes. I probably have close to a 100 miles so far on this pair and they have been wonderful. I bought a half size bigger to accommodate arch supports and the fit was perfect. No break in time either. I have a wide foot and there is plenty of room. Overall I am very happy with these new Asolo's. With REI's liberal return policy you have nothing to lose by trying these out. BIG 5 stars from me.
Ramonarita at REI on 06/06/2012

Asolo is Great!!

THESE ASOLO BOOTS WERE THE ANSWER TO MY PRAYERS! I can hike again finally! I have a foot injury I will have to consider every time I buy a pair of shoes from now on. I have plantar fasciitis and I needed a stiff sole. I didn't realize the break in time these would require and my body had to get used to them too. I do have fairly flat feet and these boots do not have a very high arch which is great. I feel supported by them when I lift heavy loads and I am comfortable during and after the hike. I do not use them for everyday use as I find them uncomfortable on pavement (but then again I don't believe they were made for pavement). I just love these boots!!
doodles at REI on 12/12/2013

Comfortable From Day One

I did not want to get new hiking boots as I was afraid of the "break-in" period and I had recently had an ankle injury. However no worries with these boots. Comfortable from day one on a slightly swollen ankle that I wore a brace on and on the non injured foot one pair of light wool socks and after 8 hour of hiking NO PROBLEMS. Light weight despite the large "look" of the boots, in and out of mud puddles and no wet feet! Great support, did not slide in mud or snow as we hiked (tested in the Colorado Rockies).
Bookie at REI on 09/09/2013


Purchased these for a 120 mile hike from Denver to Breckenridge, hiked about 5 miles total to break them in a week before the trip. We averaged 15-20 miles a day, easy to rough, dusty to mucky muddy terrain and they were AMAZING! I wore thin socks (the double layer blister socks) also-- even in 90 degree heat my feet did NOT sweat. After the 120 miles they still look and fit like new.. just had to hose them off! I normally wear an 8 but had to go with an 8.5. I highly recommend!!
Holly P at REI on 07/07/2012

Great boots- Love them

A woman recommended these boots to me in the store. She said these were top of the line, indestructible, reliable, excellent boots. She's had hers for 12 years and they're still going strong. I haven't had mine that long, but I think she was absolutely right. There was some break-in, but not bad at all. I love the toe guard. They were definitely worth the money in my opinion. I expect to have these boots for a long time.
S8 at REI on 02/02/2013

Amazing hiking boots!

Liked the look of this boot and it did not disappoint. I tried it on Mt Baldy the day after I got it and I had no blisters whatsoever, then again, I didn't expect any. The lightness was a plus and I tested its waterproof-ness by jumping into the stream instead of hopping the rocks and I was totally dry. Good looks and waterproof with not much break in needed-can't go wrong in my opinion.
little traveller at REI on 06/06/2012

Negative Reviews:

blisters on narrow heels

I bought these for a 5 day backpacking trip. I walked about 15 miles in them over several shorter hikes and walks to break them in before the trip. I'm the first to admit that I didn't do enough to break them in before I took them out hiking, I waited too long to replace an old pair of boots and planned a slightly last minute trip. When I took them out for a 4 mile break-in hike, I got small blisters on my heels (wearing SmartWool trekking socks). I took them for a few more break -in walks, and thought I had solved the problem by wearing newer socks, but I made the mistake of sticking to level terrain.

I have very narrow feet (AA width in some shoes), especially in the heels. I was initially very happy with these boots because they were narrower and lighter than my previous Vasques which made me feel like I had better control over my foot placement and didn't have cinder blocks attached to my feet. Once I started climbing the continental divide on my backpacking trip, I realized that the heels were not quite narrow enough. This combined with how stiff the shoes are and how hard the interior of the boots are meant that even though my heel was probably only moving about 1-2mm per step I took, after 6 miles of uphill I had blisters the size of silver dollars on both of my heels. (I was then approached by a bear while trying to drain my blisters, but that's another story...) I ended up having to reduce the mileage of my trip and do some of my hiking Tevas because the blisters became so unbearable.

I really wanted these boots to work because they otherwise fit well, seem very durable, and are very light for the amount of support they provide. For people trying these shoes, keep in mind that the soles are very stiff and the heels have basically no padding, so if your feet move in the shoes AT ALL when you go uphill, you will probably get terrible blisters. I have tried again to take these on shorter hikes and walks, and I can still feel the same problem. I have finally given up on them working and will be returning them.
hetchhetchy at REI on 01/01/2013

Neutral Reviews:

Good Boot, Bad Fit

This boot has great promise, but did not work well for my feet.

I put 75 miles on this boot and will be returning it to REI. 25/75 miles were day hikes in the Cascades, 50/75 miles were in the backcountry of the Olympics, on snow, rock and trail. I experienced severe blisters, ankle chaffing, general foot discomfort and numbness.

-Sturdy construction well-suited for kicking steps in snow
-Great traction on snow, shale, slippery rocks and in streams
-Very water-resistant

-Runs big:
-Most of my problems are likely due to the improper sizing of
the boot
-I am usually a size 8-8.5, and I purchased size 8 boots
-I probably needed a size 7.5
-See above for note on sizing, but I used sock liners, heavy
wool socks, moleskin and tape every time I wore the boot, and
got severe heel blisters each time without exception
-Great for alpine country, not great when your trek includes many
miles gaining elevation below the tree-line
-I experienced persistent numbness in my toes and balls of feet
after my longer trek that took a few days post-trip to subside
-Difficult laces
-The tongue of the boot wrinkles easily and chaffed the front
of my ankles and left sores
-It was difficult to achieve the right secure lacing in the ankle

I will be returning this boot. I may try a smaller size of the Fission, or may try a new boot altogether.
NW Lady Hiker at REI on 08/08/2012

Asolo Fission

I wish I could've kept this boot because it is perfect for my plantar fasciitis and it is sturdy. I experienced strain at my achilles while hiking. And after the hike I would have pain at the ligaments at my ankle that I sprained 8 years ago and stiffness/pain at my ankles the next morning. I think it's a great boot, but unfortunately not for me. I've never owned a boot like this before so maybe I don't understand what it takes to break it in. But I wasn't willing to risk injuring myself to find out. I hike average 5 miles a few times a week. I just got back into hiking after 3 years of healing from plantar fasciitis. I do think it's a great boot, just not for me. So today I returned them and I'm trying another pair of Asolos.
doodles at REI on 08/08/2013

Felt flat and unsupportive in the front

I want to love this boot. We took two days and did the Half Dome trail but were rained out at sub dome. My pups were screaming (feet hurt) by the time we reached the pavement.

They didn't slip, felt supportive in the heel area, great traction, my feet stayed dry... and they looked great ;-) My feet hurt from what I can only describe as flat in the front; I felt like I was wearing a hard flip flop up there. They were completely different in the back.

I'll try a different insole and different socks (though I changed them 3 times looking for the right one). Good luck.
Jewels at REI on 07/07/2013