A few hours or multiple days, running or hiking – you move through adventure at your own pace. Inspired by runners, then refined to offer the versatility to handle a wide range of high-output mountain activities, the Cormac is designed for performance and comfort. Its 100% recycled Phasic™ LT fabric wicks moisture, breathes, and is treated for odour resistance. The fit maximizes airflow and moves with your body, the low-profile collar layers comfortably, and the seam design minimizes friction.
Updated with shorter sleeve length.
Features & Specs
Technical Features
- Moisture-wicking
- Breathable
- Lightweight
- Quick-drying
Construction
- Merrow stitch seam construction reduces seam size and irritation
- Phasic™ LT has excellent moisture management and next-to-skin feel, designed for comfort in a range of temperatures
Fabric Treatment
- DAO™ finish (Durable Anti Odour)
- FC0-DWR (Durable Water Repellent) finish repels moisture
Logos & Label Configuration
Neckline Configuration
- Crew neck
- Taped neckline interior for clean, comfortable finish
Sustainability
- Contains raw materials made with at least 30% portion of recycled content
- This article was treated with an anti-odour biocidal product (Silvadur™ )
- PFAS (Per- and polyfluoroalkyl substances) Compliant
Size XS, S, M, L, XL, XXL
Weight 110g / 3.9 oz
Fit Regular
Sizing chart
Men's
Jacket/shirt sizing chart - new sizing
Your body measurements in centimetresXXS | 78 | 84 | 69 | 83 |
XS | 81 | 89 | 74 | 88 |
S | 83 | 94 | 79 | 93 |
M | 86 | 102 | 86 | 100 |
L | 89 | 109 | 94 | 108 |
XL | 91 | 119 | 104 | 118 |
XXL | 94 | 129 | 114 | 128 |
3XL | 96 | 139 | 124 | 138 |
NOTE: Men's fit has been updated with a revised fit. Medium size remains unchanged. Smaller sizes are now tighter and larger sizes are now looser. Arc'teryx sizes are intended to fit the above body measurements. If your measurements are between sizes, select a larger size for a looser fit or a smaller size for a tighter fit.
Activity Rock/Boulder/Mountain Run/Hike
Model X000009718
Manufacturing facility Mas Active (Private) Limited - Asialine, Sri Lanka
Fit & Sizing

Fit: Regular
Our classic fit is cut comfortably throughout the chest, waist, hip, and thigh. It allows freedom of movement, provides shape, and layers comfortably over or under our layers.
Materials & Care
Materials
- Body: Lightweight polyester tech tee jersey w/ Silvadur, UPF50+, 110gsm - 80% Polyester, 20% Polyester
- Origin of fabric: JAPAN
- Origin of dying: JAPAN
- May release plastic microfibres into the environment when washing
Care
- Machine Wash Gentle Low
- Tumble Dry Gentle Low
- Do Not Bleach
- Wash Dark Colours Separately
- Do Not Dry Clean
- Do Not Iron
- Do Not Use Fabric Softener
- Double Rinse
- Do Not Wring