Arc'teryx Cormac Heavyweight Long-Sleeve Shirt - Men's
Built for freedom of movement and high-output comfort in colder conditions, the men's Arc'teryx Cormac Heavyweight Long-Sleeve shirt provides stretch, sun protection and essential warmth.
Key Details
- Phasic™ AR II engineered polyester fabric is soft, offers stretch and thermal comfort, and is made with wicking fibers
- Ergonomic design and articulated patterning remove restriction, and the clean fit layers easily and wears comfortably on its own
- FC0-DWR (durable water repellent) finish repels moisture
- Silvadur™ antimicrobial treatment provides lasting odor resistance
- Moisture-wicking and versatile
- Merrow stitch seam construction reduces seam size and irritation
- Articulated patterning for unrestricted mobility
- Low-profile collar
- Back of collar is taped for additional comfort
- Thumb loops secure the cuffs and sleeves to keep hands covered for warmth and sun protection
- The Cormac Heavyweight LS Shirt was previously the Motus AR Crew LS
- Regular fit provides freedom of movement
- This product was treated with an anti-odor biocidal product (active ingredient: silver nitrate)
- PFAS (per- and polyfluoroalkyl substances) compliant
Imported.
View the Arc'teryx Cormac Product LineView all Arc'teryx Men's Running ShirtsBest Use | Trail Running Fitness |
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Shirt Type | T-shirt |
Fabric | Phasic AR II: 100% polyester with FC0 yarn and DAO finish |
Moisture Wicking | Yes |
Sleeve Length | Long Sleeve |
Hood | No |
Thumbholes | Yes |
Gender | Men's |
Weight | 5.6 ounces |
Sustainability | Fair Trade Certified™ factory |
XXS | XS | S | M | L | XL | XXL | XXXL | XS Short | S Short | M Short | L Short | XL Short | XXL Short | S Tall | M Tall | L Tall | XL Tall | XXL Tall | 28 | 30 | 32 | 33 | 34 | 36 | 38 | |
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Chest | 33 | 35 | 37 | 40 | 43 | 47 | 51 | 54.5 | 35 | 37 | 40 | 43 | 47 | 51 | 37 | 40 | 43 | 47 | 51 | |||||||
Sleeve Length | 30 | 31.5 | 32.5 | 34 | 35 | 36 | 37 | 38 | 32 | 33 | 34 | 35 | 36 | 37 | 33 | 34 | 35 | 36 | 37 | |||||||
Waist | 27 | 29 | 31 | 34 | 37 | 40.5 | 44.5 | 48.5 | 29 | 31 | 34 | 37 | 40.5 | 44.5 | 31 | 34 | 37 | 40.5 | 44.5 | 30 | 32 | 34 | 35 | 36 | 38 | 40 |
Hip | 32.5 | 34.5 | 36.5 | 39.5 | 42.5 | 46.5 | 50 | 54 | 34.5 | 36.5 | 39.5 | 42.5 | 46.5 | 50 | 36.5 | 39.5 | 42.5 | 46.5 | 50 | 35.5 | 37.5 | 39.5 | 40.5 | 41.5 | 43.5 | 45.5 |
Inseam | 31 | 31 | 31.5 | 32 | 32.5 | 33 | 33 | 29 | 29.5 | 30 | 30.5 | 31 | 31 | 34.5 | 35 | 35.5 | 36 | 36 | 31.5 | 31.5 | 32 | 32 | 32 | 32.5 | 33 |
Sizing Notes
Measurements are stated in inches unless otherwise indicated.
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Customer Images
From the Mail to the Trail
This LS Shirt was ordered in boxcar greenish color to match pants & layers I use in cool & cold weather. My first use was as an outside layer. On a day-Hike after unpacking it, I completed the last section of the new "River to Clouds" 35 miles Trail in the Chattanooga - Lookout Mountain area, TN. It got the job done to perfection. Great shirt. Thanks.
Impressively functional
The material on this shirt is amazing. I wear it for running in the fall and spring between 0 and 10C and underneath a Squamish down to -10C or so. It wicks sweat like nothing else I’ve used before, and is super lightweight. My only suggestion and reason for 4 stars is the neck hole is massive. I don’t really know the purpose of this but it makes it less comfortable to wear for me. Otherwise the fit is perfect, next to skin through arms and chest, and a bit of room in the body with stretch all over. I do recommend this shirt as it is impressively functional but misses the mark a little bit with the fit.
Poor quality at the logo
Great quality overall, which is mostly the same with the Motus AR got last year. However, the logo went off after the first wash. Is this expected? Did I got a defect item?
Hi there, we are sorry to hear about the issue with the logo on your Cormac Heavyweight Shirt LS. Our After-Sales team has received your reply and will get back to you as soon as we can.
A very pleasant shopping experience.
This dress is very breathable and comfortable, and I like it very much.
Good!
It just took four days to deliver!The material is comfortable xD
Way too big
As others have mentioned - this is very voluminous. It is marketed as a first layer and that is, indeed, absolutely unusable for that purpose - loose and baggy. It's not next to skin, it does not wick, flaps around. It shows on the promo shots. I get it, the models are super skinny but it is equally flappy on normal people. Very different to Motus or the previous Phase lines. The Phasic material is, in my opinion, the best synthetic fabric ever made, I have been a fan for years, have 10+ pieces made of it. I will be keeping this as a relaxed fit long sleeve running shirt for the shoulder seasons. It will be fine for that. Just don't expect it to be a first layer where you would be putting things on top of it. It is not a bad shirt, it's just not what they say it is.
Perfect for People with Broader Shoulders
This shirt does fit larger, however for people with longer arms that usually struggle matching the width of clothes to the length, it is perfect. Usually I order an XL or a 2XL when I order long sleeves just so that the sleeves actually cover my forearms completely, however a size large of this works fine. It's not really mentioned, but this also has really convenient thumb holes to have the shirt cover the palms of your hands. Very thing, definitely plan on having more layers if it gets below 45.
Best Shirt I have ever bought
Best Shirt I have ever bought....Loved the shirt so much that I bought another one after wearing it for just one day. My one and only complaint is there is a very small selection (3 choices) of colours. If Arc'teyx had this shirt in a miltiude of colours I would buy many many more. Shirt has a great fit for me and it is made of exceptional material, it just wears amazingly! It is my first choice in the morning when I reach to put on a shirt
Arc'teryx logo is fragile and peel off
I purchased this item before summer 2025 with the intention of using it as a lightweight jacket for sleeping comfortably on airplanes. While the material is breathable and the fit is comfortable, the Arc'teryx logo is quite fragile and started to peel off after minimal use. This significantly affects the perceived quality of the product, especially considering the brand’s reputation and price point.
Great shirt!
Love this shirt! The fit is great! I wore it as a base layer under a down jacket in 10 degree weather above 13 thousand feet this weekend and was super comfortable even during high output times while carrying my children through difficult spots in the mountains. I’ve also worn it out downtown for a friends birthday dinner and got compliments on it all while being perfectly warm on a chilly night!