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Arc'teryx

Men's Atom Hoody

Warm-even-when-wet hoody you can hike, climb, tour, and live in.

$300
Color: Stratus
Also inMen'sMen's
Size:
Size guide
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Top features
Moisture-resistant outer face fabric
Performance stretch fleece side panels give ventilation
Resilient Coreloft™ Compact 60 insulation
Description

The Atom Hoody is the solution to your “which jacket should I wear?” problem. Wear it solo for chilly forest hikes with windy summits, climbing at the crag, and hanging at the campsite, or as a midlayer for touring and wet winter objectives. The Coreloft synthetic insulation stays warm even if you run into light weather, making it a better alternative to down for high-output days year round.

Perfect for
Trail
Hiking and mountain days.
Cold weather
Warm even when damp.
Built to last
Covered by the Arc'teryx warranty.
Features
  • Moisture-resistant outer face fabric.
  • Performance stretch fleece side panels give ventilation.
  • Resilient Coreloft™ Compact 60 insulation. Resilient Coreloft™ Compact 60 insulation is breathable, warm, and light, performs if wet, and delivers loft retention that resists packing out
  • Light, soft Tyono™ 20 is air permeable.
  • Breathable 20D recycled nylon liner helps regulate…. Breathable 20D recycled nylon liner helps regulate temperature and is soft and comfortable next to the skin
  • Fitted. Fitted, with articulated patterning for mobility and comfort
Size & Fit
Slim
Regular
Relaxed

Close to the body. Size up if you're between sizes or want room to layer underneath.

  • Our trimmer fit is patterned to stay close to the body through the chest, waist, hip, and thigh. Its low profile eliminates bulk, moves with the body, and fits comfortably over first layers or under outer layers.
  • Garment Centre Back Length: Size M is 29"/73cm - Varies by size
Open size guide
Materials
  • Body: 20dx20d nylon ripstop, FC0 DWR, 45gsm - 100% Nylon.
  • Contrast: Circular Knit Fleece, 215 gsm, FC0 DWR - 93% Polyester, 7% Elastane.
  • Synthetic Insulation: Coreloft™ 60 (60 g/m²) - 100% Polyester.
  • Lining: 20d recycled nylon ripstop with FC0 DWR, 40gsm - 100% Nylon.
  • 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.
About the brand

Born in the Coast Mountains of British Columbia, Arc’teryx designs gear built for the wildest weather and the steepest lines. Every jacket, pack, and layer is engineered for precision and performance — because when conditions get real, your gear should too. At Mountain Sports, we love Arc’teryx for its unmatched craftsmanship and commitment to doing more with less, in nature’s harshest playgrounds.

Shop all Arc'teryx

SKU X000009556 · Style X000009556
Size guide

Arc'teryx Size Chart - Men's Apparel

Arc'teryx Sizing Chart

Measurements are in inches, unless otherwise noted. Charts reflect body measurements, not garment measurements.

Men's Jackets & Shirts:

Size Sleeve Chest Waist Hip
XXS 30 33 27 32.5
XS 31.5 35 29 34.5
S 32.5 37 31 36.5
M 34 40 34 39.5
L 35 43 37 42.5
XL 36 47 40.5 46.5
XXL 37 51 44.5 50
3XL 38 54.5 48.5 54

Arc'teryx sizes are intended to fit the body measurements above. If your measurements are between sizes, select a larger size for a looser fit or a smaller size for a tighter fit. Arc'teryx has recently updated the men's fit: medium remains unchanged, smaller sizes now fit tighter and larger sizes now fit looser.

Men's Pants & Shorts (Alpha Sizes):

Size Waist Hip Regular Inseam Short Inseam Tall Inseam
XXS 27 32.5 31 29 34
XS 29 34.5 31 29 34
S 31 36.5 31.5 29.5 34.5
M 34 39.5 32 30 35
L 37 42.5 32.5 30.5 35.5
XL 40.5 46.5 33 31 36
XXL 44.5 50 33 31 36
XXXL 48.5 54 - - -

Men's Pants (Numeric Waist Sizes):

Size Waist Hip Regular Inseam Short Inseam Tall Inseam
28 30 35.5 31 29 34
29 31 36.5 31.5 29.5 34.5
30 32 37.5 31.5 29.5 34.5
31 33 38.5 32 30 35
32 34 39.5 32 30 35
33 35 40.5 32 30 35
34 36 41.5 32.5 30.5 35.5
36 38 43.5 33 31 36
38 40 45.5 33 31 36

Numeric pant sizes correspond to the body measurements shown above. Several Arc'teryx pant models are sized numerically and may be offered in Short, Regular, and Tall inseam lengths - see each product page for the options available.

How to measure: Sleeve - with your arm relaxed at your side and slightly bent, measure from the center back of your neck, across the shoulder, over the elbow and down to the wrist. Chest - with arms relaxed at your sides, measure under your arms around the fullest part of your chest. Waist - measure around your waist at the narrowest part. Hip - standing with feet hip width apart, measure around your hips at the widest part. Inseam - from a standing position, measure from your crotch down the inside of your leg to the floor.
Performance

How it ranks across conditions.

Calibrated against comparable products we stock, so you can compare like for like.

Warmth

Light
Moderate
Warm
Warmest

Coreloft™ 60gsm synthetic insulation.

Weather protection

Water resistant
Water repellent
Highly weatherproof
Waterproof

PFAS-free FC0 DWR finish sheds light rain.

Breathability

Low
Moderate
High
Very high

Synthetic fill breathes well for its warmth.

Packability

Bulky
Moderate
Packable
Ultralight

Brand-stated weight 355g.

Best for

Is this right for you?

Hiking and trail days

Moves well on the up, layers under a shell when the weather turns.

Not for: High-output efforts in mild weather; you will overheat.

As a midlayer

Slim enough to wear under a hardshell without binding at the shoulders.

Not for: Wearing over a bulky jacket — layer it under, not on top.

Everyday wear

Clean enough for town; the fabric stands up to a pack and a car seat.

Not for: Formal occasions.

Full spec sheet

Technical Specs

Style numberX000009556
Weight355g / 12.5 oz
FitFitted
Centre Back LengthSize M is 29"/73cm - Varies by size
ContrastCircular Knit Fleece, 215 gsm, FC0 DWR - 93% Polyester, 7% Elastane
Body20dx20d nylon ripstop, FC0 DWR, 45gsm - 100% Nylon
Synthetic InsulationCoreloft™ 60 (60 g/m²) - 100% Polyester
Lining20d recycled nylon ripstop with FC0 DWR, 40gsm - 100% Nylon
Country of manufactureBangladesh
VendorArc'teryx
Questions, answered

Before you buy.

Pulled from chats, emails and store visits. The things people actually ask us before they buy. Don't see yours?

Ask a question
How do I wash it?

Arc'teryx specify: Machine wash gentle low; Tumble dry gentle low; Do not bleach; Wash dark colours separately; Do not dry clean; Do not iron.

Where is it made?

This style is manufactured in Bangladesh. Arc'teryx publish the facility as YOUNGONE (CEPZ) LTD, Bangladesh.

How does it fit?

Arc'teryx call this a fitted fit. Our trimmer fit is patterned to stay close to the body through the chest, waist, hip, and thigh. Its low profile eliminates bulk, moves with the body, and fits comfortably over first layers or under outer layers.

Does the insulation still work if it gets wet?

Largely, yes — that is the point of synthetic fill. Unlike down, Coreloft keeps most of its loft when damp, so it stays warm in wet cold where down would collapse. It is not waterproof; in sustained rain wear a shell over it.

What does the Arc'teryx warranty cover?

Arc'teryx warrant their garments against defects in materials and workmanship for the practical lifetime of the product. That covers manufacturing faults, not wear and tear or accidental damage. Bring it to us and we will help you start the claim.

Find the right one for you

How the Atom Hoody compares

Head-to-head against the closest alternatives we stock, so you can see where this one sits before you commit.

Feature
Arc'teryx
Atom Hoody
You're viewing
Arc'teryx
Atom Jacket
Arc'teryx
Atom SV Hoody
Weight355g / 12.5 oz335g / 11.8 oz490g / 1 lb 1.3 oz
InsulationCoreloft™ Compact 60 insulationCoreloft™ 60 synthetic insulationCoreloft™ 120 synthetic insulation
Main fabricTyono™ 20, FC0 DWR, 45gsm20d nylon ripstop, FC0 DWR, 45gsmTyono™ 30 micro ripstop, PFAS-free DWR
Weather protectionWind resistant, water repellentWind resistant, water repellentWind resistant, water repellent
FitFittedFittedRegular
MSRP$300$280$350
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