Atom Hoody
Guide Pick™ ProductAdaptable Warmth for the Mountain and Beyond
The Arc'teryx Atom Hoody delivers reliable warmth, breathability, and weather resistance for changing alpine conditions. Built with Coreloft™ Compact insulation and a Tyono™ 20 shell, it balances protection and comfort whether worn as a standalone piece or a midlayer. Lightweight and compressible, it packs easily into any mountain kit, ready for anything from cold approaches to windy summits.
Free Shipping on order over $150, and no hassle returns - we're all about simplicity.
Pickup available at Whittaker Mountaineering
Usually ready in 24 hours
Atom Hoody
Black Sapphire / SM
Whittaker Mountaineering
30027 SR 706 E
Ashford WA 98304
United States
Diggin' in to Details
Our Take
Arc'teryx Men's Shirts/Jackets Sizing
All Measurements are in Inches
| Size | Sleeve | Chest | Waist | Hip |
| XXS | 31 | 34 ½ | 28 | 33 ½ |
| XS | 32 | 36 | 30 | 35 ½ |
| S | 33 | 38 | 32 | 37 ½ |
| M | 34 | 40 | 34 | 39 ½ |
| L | 35 | 43 ½ | 37 | 42 ½ |
| XL | 36 | 46 ½ | 40 | 45 ½ |
| XXL | 37 | 50 ½ | 44 | 49 ½ |
| 3XL | 37 ½ | 54 ½ | 50 ½ | 56 |
Why We Love It
Miles Watson
“I use the acteryx atom all the time personally and it seems as though the usable temp. range that thing is useful at is huge. I wear it when its warm as well as when its really quite cold and it performs well. I really like it.”— Miles Watson, RMI Guide
Our Philosophy
We Simplify Outfitting
Whittaker Mountaineering was born out of the need for RMI to make sure their clients had the appropriate gear to get to the top of Mt. Rainier safely. After decades of trying, reviewing, arguing-over, and recommending gear, we can’t help but know what we’re doing by this point. We know what works, we know what doesn’t, and we use that expertise to stock our store.
What's the diff?
Product Comparison
Interested in seeing how this product stacks up against its competitors?
