Arc'teryx Men's Proton Lightweight Hoody
Light, breathable insulated hoody for high-output activities in cold conditions. *The Proton Lightweight Hoody was previously the Proton FL Hoody.
All measurements are in inches
| Size | Sleeve | Chest | Waist | Hip |
| XXS | 30 | 33 | 27 | 32 1/2 |
| XS | 31 1/2 | 35 | 29 | 34 1/2 |
| S | 32 1/2 | 37 | 31 | 36 1/2 |
| M | 34 | 40 | 34 | 39 1/2 |
| L | 35 | 43 | 37 | 42 1/2 |
| XL | 36 | 47 | 40 1/ 2 | 46 1/2 |
| XXL | 37 | 51 | 44 1/2 | 50 |
| 3XL | 38 | 54 1/2 | 48 1/2 | 54 |
Free shipping on orders over $99 (oversize charges may apply) - Learn More
Fast and easy returns (no returns for final sale or heavily discounted items) - Learn more
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Premium gear is our promise
We were established almost 75 years ago by John Monod, a Swiss mountain guide and ski instructor. Quality outdoor gear is what our brand was built upon since 1949. Learn more.
Frequently Asked Questions
Have more questions? See all FAQ's
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Absolutely! We offer fast & easy returns on most products.
Exceptions include products 30% off or more, climbing gear, underwear & more.
Read our return policy here.
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All orders over $99 will qualify for free standard shipping within Canada.*
International shipping charges will apply for all non Canadian orders.
Oversize charges apply to larger items.
*See all shipping information here.
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Standard shipping estimates are as follows:
Alberta and British Columbia: 2-4 business days
Saskatchewan and Manitoba: 3 - 4 business days
All other provinces and territories: 5 - 9 business days