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Cosmic Jacket PRIMO

Rated 4.8 out of 5
Based on 89 reviews

$599.00

The workhorse.

The Cosmic Jacket PRIMO is built tough for serious mountain riding. With a tailored fit, smart articulation, and reinforced construction, it handles demanding terrain while keeping you comfortable all day long. From tight tree-skiing and pow-day lift laps to high mountain objectives, this is the one jacket to do it all in flying colors.

We also offer the Cosmic Jacket PRIMO in extended sizes!

PNW Primo 3L Fabric

  • 100% Recycled Nylon, Bluesign Certified
  • 20,000mm Waterproof/Breathable 
  • Mechanical Stretch
  • PFAS-Free!

This is a non-insulated shell jacket.

  • Enhanced fit for best-in-class articulation
  • Water-resistant construction
  • Fully-seam taped with 3L tape
  • Water-resistant zips on all exposed openings
  • Helmet-compatible hood with built-in elastic and three-point adjustment
  • 16” pit vents
  • Zip chest pockets, hand pockets + left-side forearm pass pocket
  • Internal laminated zip chest pocket on right side
  • Internal drop mesh storage pockets
  • Removable powder skirt
  • Adjustable hem with cord
  • Velcro adjustable wrist cuffs
  • RECCO® reflector
  • 30.1 oz. (size M)

Our PRIMO 3L Collection is most at home at the resort, but is backcountry-ready for your touring adventures!

The Cosmic Jacket PRIMO offers our signature ‘modern freeride fit’ which offers a relaxed style, plenty of room for layering underneath, and enhanced articulation throughout for effortless motion.

Our 2025/26 Cosmic PRIMO runs large; if you are between sizes, size down.

 

Model info:

  • Corey (in Expedition Ultraviolet + Dust Khaki) is 5'8", 155lbs. Chest 36", Seat 36". He is wearing a size Medium.
  • Lorenzo (in Mountain Maize, Mighty Pine, and Black) is 5'11", 190lbs. Chest 41", Waist 33", Seat 40". He is wearing a size Large.

We highly recommend referencing our Size Guide (above the ADD TO CART button) and customer reviews, below, when choosing your size!

 

We do our best to process and ship all orders within 1-2 business days, and we offer free exchanges + easy returns within a 30-day window.

For more information, see: Shipping Page and Returns & Exchanges Page

 

Waterproof

With a 3L construction and 20,000mm rated membrane, PRIMO will keep you dry through nearly any storm.

The Fit

Our bestselling jacket has a roomy fit throughout to allow for a variety of conditions and layers.

Breathability

This membrane is rated at 20,000gr/m2, and well-placed vents make our PRIMO collection a loyal companion both in and out of bounds.

Durability

Not quite indestructible, our PRIMO material can withstand abuse. And then some.

average rating 4.8 out of 5
Based on 89 reviews
  • 5 Stars
    79 Reviews
  • 4 Stars
    7 Reviews
  • 3 Stars
    2 Reviews
  • 2 Stars
    1 Review
  • 1 Star
    0 Reviews
96% of reviewers would recommend this product to a friend
Sizing
Rated 0 on a scale of minus 2 to 2, where minus 2 is Runs small, 0 is True to size and 2 is Runs large
Quality
Rated 4 out of 5
Happiness
Rated 4 out of 5
Review posted
Reviewed by Mike C.
Verified Reviewer
Ski or Board
  • Snowboard
Backcountry vs Resort
50/50 Resort & Backcountry
Age
45-49
Height
6ft 3″
Weight
290-294
Waist (inches)
42.5
Natural inseam (inches)
30
Body Shape
Curvy
Size Purchased
3XL
Rated 5 out of 5

I Look, Goood in this Jacket

My Favorite Technical Jacket that fits my Sasquatch build! I can layer up on the cold blowing days or just rock a simple base layer and the jacket out performs any other coat I've used in the 39 years of Snowboarding. I teach at Alpine West Ski School on Snoqualmie Pass, WA. and im thrown every act of weather from Heavy snow to Cascade Concrete! I needed this jacket and all you Sasquatch build people, you do too!

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I recommend this product
Sizing
Rated 1 on a scale of minus 2 to 2, where minus 2 is Runs small, 0 is True to size and 2 is Runs large
Quality
Rated 5 out of 5
Happiness
Rated 5 out of 5
Was this helpful?
Review posted
Reviewed by Brad N.
Verified Buyer
Ski or Board
  • Alpine Ski
Backcountry vs Resort
Primarily Resort
Age
60-64
Height
5ft 11″
Weight
250-254
Body Shape
Athletic
Size Purchased
XL
Rated 5 out of 5

Awesome Again!

This is my 7th Trew Gear jacket and my 4th Cosmic. I keep buying them for a reason. Now if it would just snow some more this winter so I could go throw myself into some storm riding (which is where these jackets are the best!) I would be a super happy 5 stars.

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I recommend this product
Sizing
Rated 0 on a scale of minus 2 to 2, where minus 2 is Runs small, 0 is True to size and 2 is Runs large
Quality
Rated 5 out of 5
Happiness
Rated 4 out of 5
Was this helpful?
Review posted
Reviewed by Dylan B.
Verified Buyer
Ski or Board
  • Snowboard
Backcountry vs Resort
Primarily Resort
Age
20-24
Height
5ft 9″
Weight
160-164
Body Shape
Average
Size Purchased
M
Rated 5 out of 5

Recommend over arcterks

I bought the Arc’teryx Sabre SV in a Medium and it fit like an XL. For $900 it felt like a trash bag, which is crazy coming from a company with thousands of employees.

After my buddy got a Primo, I was like ok, that’s sick. I ordered mine based on the models on the website and went with a Medium, hoping it wouldn’t be huge like the Sabre. It fit perfect. (If you like a tighter fit, you could potentially size down.) (I'm 5' 9" - 160lbs)

I’ve worn it a couple times already, but haven’t had a ton of time in it yet because winter 2026 hasn’t really warranted a jacket this thick. The few days I did wear it though, it worked perfectly.

The front pockets are massive. You could fit a Costco rotisserie chicken in there (or your skins, IG). I got the purple/blue colorway and it’s flippin sick.

Trew came to Bozeman, MT to do a ski film comp, which is what initially put them on my radar. It showed they actually care about the sport and the people in it. I’m still blown away by the quality a small team like Trew can deliver compared to streetwear brands pretending to sell outdoor gear (Arc’teryx).

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I recommend this product
Sizing
Rated 1 on a scale of minus 2 to 2, where minus 2 is Runs small, 0 is True to size and 2 is Runs large
Quality
Rated 5 out of 5
Happiness
Rated 5 out of 5
Was this helpful?
Review posted
Reviewed by Lincoln F.
Verified Buyer
Cosmic Jacket PRIMO - Extended [OUTLET]
Reviewing
Cosmic Jacket PRIMO - Extended [OUTLET]
Ski or Board
  • Alpine Ski
Backcountry vs Resort
Primarily Resort
Age
45-49
Height
6ft
Weight
250-254
Chest (inches)
52.5
Waist (inches)
46.5
Seat (inches)
36
Natural inseam (inches)
32
Body Shape
Round
Size Purchased
5XL
Rated 5 out of 5

I’m so excited for this seaso.

This coat is incredible. I love my matching pants. I’m so pumped. Only draw back, no draw string. I’ll be adding one to the back. But other than that unreal gear.

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I recommend this product
Sizing
Rated 2 on a scale of minus 2 to 2, where minus 2 is Runs small, 0 is True to size and 2 is Runs large
Quality
Rated 5 out of 5
Happiness
Rated 5 out of 5
Was this helpful?
Review posted
Reviewed by Pete L.
Verified Buyer
Cosmic Jacket PRIMO - Extended [OUTLET]
Reviewing
Cosmic Jacket PRIMO - Extended [OUTLET]
Ski or Board
  • Alpine Ski
Backcountry vs Resort
Primarily Resort
Age
55-59
Height
6ft
Weight
295-299
Body Shape
Curvy
Size Purchased
3X
Rated 5 out of 5

C'MON!!!

Your shit is dope! Quit asking me. I tell everybody I know about your gear. You need a hug? You don't know this already? You're the girl in the 80s movie who got a cute haircut and contact lenses over the summer and comes back to high school and everybody is blown away realizing what a cutie you are. Own it! But don't turn into one of the mean girls.

Sorry. I've been making chili Verde for four hours. I'm really tired. Plus. You know. Beers.

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I recommend this product
Sizing
Rated 0 on a scale of minus 2 to 2, where minus 2 is Runs small, 0 is True to size and 2 is Runs large
Quality
Rated 5 out of 5
Happiness
Rated 5 out of 5
Was this helpful?