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The Arc'Teryx Gamma SL Hybrid Pant uses a combination of fabrics to protect you from moisture and abrasion while allowing your body to regulate its own temperature and stay dry.

  • Fortius 1.0 on the knees, seat, and front of the lower legs for moisture protection, and durability
  • TerraTex breathable fabric on the front of the pants and the backs of the lower legs moves moisture away from the body
  • Zippered front hand pockets keep your valuables safe
  • Seamless instep reduces snags
  • Gusseted crotch for added durability and unlimited range of motion

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Here's what others have to say...


Well designed all-year pant

  • Familiarity:I've used it several times
  • Fit:Runs small
  • Height: 5'9"
    Weight: 140 lbs
    Size Purchased: Small

While I understand the argument that goats and bears don't really care how my pants fit, many hiking trousers drape so loosely, I might as well be attending a Hoobastank concert. Even worse: they make noise when I walk, and get caught on sticks and rocks.

These pants fit slim and trim, even for a short guy like me, and more importantly, serve as a versatile and well-designed year-round pant. They come with the hooks and pull-strings common in upscale outdoor pants, but what really sets them apart is their hybrid construction: a cool patchwork of stretchy, breathable material and durable, water-resistant shell.

I'm a "pants all year" kinda hiker, and took these on a couple 3 day summer treks in Oregon, one of which was the geologically diverse Timberline Trail Loop. These pants dried quickly after crossing rushing rivers, kept me cool on sun-baked rims, and stretched nicely while scrambling through washouts.

They are thin pants, so don't expect them to be super durable. Mine already need a patching on the front panel, but anything light enough to be good year-round isn't gonna be super tough.


Excellent pants for winter climbing

  • Familiarity:I've put it through the wringer
  • Fit:True to size
  • Height: 5'9"
    Weight: 165 lbs
    Size Purchased: Small

It's tough to find pants that strike the right balance between having enough room and having so much room that they are baggy and get in the way. It's also tough to find pants that provide some warmth while at the same time not causing overheating during winter climbing. Getting both of these dimensions right at the same time...I haven't yet found another pair of pants that are better for me.

I have been able to use these pants in a very wide range of temperatures and weather conditions, from above freezing with no base layer to well below 0F and beefier base layers.

One particularly clever feature of these pants is a small attachment on the front of the cuff which will hook onto your laces (provided your boots have exterior laces), which really helps to keep snow out. Keep in mind, though, that the cuff is slim enough that these pants will not likely fit over your ski boots, so I would not recommend these as ski pants, although they can work in a pinch.

Photo: ice climbing in the Catskills, NY.

Excellent pants for winter climbing

super helpful review...and what a great photo!

Unanswered Question


I have an Arcteryx Psiphon in size 32 and it fits me perfectly. What size should i order for the Gamma SL Hybrid pant?




9 months a year

  • Familiarity:I returned this product before using it
  • Fit:Runs small
  • Height: 6'
    Weight: 205 lbs
    Size Purchased: xxl

This would have been my third pair of these, have the two darker colors, but I found this years style cut smaller than in previous years So I returned them---this was the COAL MINE color I returned 2015---ex soccer player they were small in the butt


Superior trail pants

  • Familiarity:I've used it once or twice and have initial impressions
  • Fit:True to size

I used these pants this last weekend to hike to the top of Half Dome. There is plenty of freedom of movement. Not once did the pance restrict me. Even climbing the cables these were comfortable. They are lighter than other pairs of pants I have that are similar and they are a little cooler. All the pockets zip. This was nice because I wouldn't want to lose anything on the cables. If something fell out it would be gone. I do wish there was a rear pocket but that is just me. The weather wasn't to severe so I wasn't able to see how water resistant they are but the material feels like it would do the job. Can't wait to put these through some weather and climbing. I'm sure they will hold up and do it comfortably.


Seriously, these are amazing pants

  • Familiarity:I've used it several times
  • Fit:Runs small

I used to hike 4 seasons in Gamma LTs, which were a bit hot for summer Sierra temps (80 - 90F), so I've spent the past year trying several of Arc's light models. Ramparts: comfortable, true to size, baggy, no pocket zips. Palisades: run small, odd pocket placement. Perimeters: skinny jeans at the top and bellbottoms at the bottom, useless pockets.

I finally tried the Gamma SL Hybrids when the Iron Anvil colorway was released, as it's the first version that hasn't looked preposterous. Man, am I glad I did. Zippable pockets. Breathable. Quick-drying. Protection where you need it. Awesome built-in gaiter hooks. Comfortable at high exertion in mid-80s temps. I think these may have stolen the crown from the LTs as the best all-around 3-season hiking pants Arc makes.


Amazing versatile paints!

    First off Backcountry's "perfect fit " feature is spot on! I have never purchased a pair of pants that actually fit proper. That is until now.

    These pants a fabulous. They are the most comfortable pant I have ever put my azz into ever! They stretch where they need to stretch and are practically bullet proof for a pair of such light weight paints. add a pair of ice breaker underwear, and if your like will never want to ware any type of pants ever again in the warmer months.From climbing a rock face to a night in town prospecting ;) these babies preform lol if you have a slim/athletic build...dont hesitate


    Great "Light" pants

    • Gender:Male
    • Familiarity:I've used it several times

    I like these better than the Rampart which I love. Good zippers, light, and easy to move around in...


    made for Ireland

      great pants---just wore them in Ireland---very comfortable easy to wash---wish they had back pocket and not so expensive but other than that---they are great for travel---


      Don't leave your rain pant at home

      • Gender:Male
      • Familiarity:I've used it several times

      I really liked these pants at first. They were very comfortable to hike in and I experienced no leakage when sitting on wet rocks or in drizzle. However, this morning I went out hiking in a moderate rain. The temperature was 40 deg.F and there was a 2 to 4 mph wind blowing. After 1-hour, the right pant leg - just below the top of the stretchy lower section - started to leak cold rain water down my leg. The rest of the garment remained dry.

      These pants are not sufficiently water resistant for use in even a moderate rain.