Arc'teryx Proton Hoody Men's Insulated Jacket

The Arc'teryx Proton Hoody is a breathable synthetic insulation layer built for climbers and high-output mountain activities. Its 80gsm Coreloft™ Compact insulation works together with an air-permeable face fabric and liner to regulate temperature and manage vapour build-up during movement.

The Fortius™ Air 20 nylon shell is light and durable, articulated patterning removes restriction, and a helmet-compatible insulated hood extends the warmth. This updated version features a PFAS-free DWR treatment, a Fortius™ Air 20 face fabric with 42% recycled nylon, and Coreloft™ Compact insulation for improved stretch and breathability.

Key Features

Brand	Arc'teryx
Model Number	X000008436
Gender	Men's
Fit	Fitted
Activity	Climbing, High-output mountain activities
Material	Synthetic Insulation: Coreloft™ Compact, 60gsm - 100% Polyester, Synthetic Insulation: Coreloft™ Compact, 80gsm - 100% Polyester, Lining: 20d recycled nylon plain weave, 42gsm - 100% Nylon, Body: Fortius™ Air 20 - Plain Weave, FC0 DWR, 58gsm - 88% Nylon, 12% Elastane
Insulation Type	Coreloft™ Compact synthetic insulation
Face Fabric	Fortius™ Air 20, 88% Nylon, 12% Elastane with FC0 DWR
Lining	20d recycled nylon plain weave, 42gsm
Hood	Helmet-compatible insulated hood
DWR Treatment	PFAS-free DWR
Certifications	Fair Trade Certified™, bluesign® Approved Materials
Origin of Fabric	Taiwan, China
Origin of Dyeing	Taiwan, China
Origin of Manufacture	Bangladesh

Highlights

• Proton: Air permeable mid layer insulation with abrasion and weather resistant outer surface.
• Fair Trade Certified™: Produced in a Fair Trade Certified facility.
• Multi-use: Versatile high performance designs for diverse activities and conditions.

Materials & care

Synthetic Insulation: Coreloft™ Compact, 60gsm - 100% Polyester, Synthetic Insulation: Coreloft™ Compact, 80gsm - 100% Polyester, Lining: 20d recycled nylon plain weave, 42gsm - 100% Nylon, Body: Fortius™ Air 20 - Plain Weave, FC0 DWR, 58gsm - 88% Nylon, 12% Elastane, Origin of fabric: TAIWAN, CHINA, Origin of dyeing: TAIWAN, CHINA, Origin of Manufacture: BANGLADESH, May release plastic microfibres into the environment when washing

Sizing & fit

This jacket has a fitted cut. For size M: back length 77.1 cm, chest circumference 118.0 cm, hem circumference (relaxed) 110.0 cm. For size L: back length 79.6 cm, chest circumference 125.6 cm, hem circumference (relaxed) 117.6 cm.

How to use

Wear the Proton Hoody as a breathable midlayer for climbing and high-output mountain activities. Its air-permeable design regulates temperature and vapour build-up during movement, while the helmet-compatible insulated hood extends warmth when needed.

Frequently asked questions Can the Proton Hoody be used for skiing in negative temperatures? Yes, it can be used for skiing in negative temperatures, but it is best worn as a midlayer under an waterproof shell, especially in cold, windy or changing conditions. For spring skiing or milder days, it can be worn on its own. The warmth felt also depends on the intensity of the activity: during high-intensity skiing its breathability is an advantage, while during low-intensity or long static periods, a windproof and waterproof outer layer becomes essential to retain heat. What are the measurements for size M and L? Size M: Back length 77.1 cm, chest circumference 118.0 cm, hem circumference (relaxed) 110.0 cm. Size L: Back length 79.6 cm, chest circumference 125.6 cm, hem circumference (relaxed) 117.6 cm. Does layering the Proton Hoody over an Atom or a shell add warmth? Layering the Proton Hoody over an Atom or a shell will add some warmth, but not in the same way a true belay jacket would. The Proton is built as an air-permeable midlayer, so it is designed to release heat during movement rather than trap it. When placed over another insulated piece or over a shell, you get a small bump in warmth from the extra synthetic insulation, but it will not deliver the high level of heat retention you would expect from a purpose-built belay jacket. Is the Proton Hoody suitable for running at -15°C with just a base layer? The Proton Hoody provides breathable warmth for climbing and high-output mountain activities and features 80gsm Coreloft™ Compact insulation. However, Arc'teryx does not rate garments for temperature as there are too many factors that influence this result from person to person.

Shipping & Delivery

Shipping is FREE on every order — no minimum purchase, no promo code needed.

• Processing time: orders ship within 1–3 business days (Monday–Friday, excluding holidays).
• Delivery time: after your order ships, most packages arrive in 2–5 business days.
• Tracking: you'll receive an email with your tracking number as soon as your order leaves our facility in Wenatchee, WA.
• Where we ship: we currently ship to addresses within the United States.
• Large items: TVs and large appliances are packed with extra protection and may require a signature on delivery.

Questions about an order? Email help@chantforge.com with your order number.

30-Day Free Returns

Changed your mind, or the size isn't right? You can return most items within 30 days of delivery, and the return shipping is on us.

1. Email help@chantforge.com with your order number and the item(s) you'd like to return.
2. We'll send you a prepaid return label and instructions.
3. Pack the item in its original condition with all tags, accessories and packaging, and drop it off with the carrier.
4. Once we receive and inspect your return, we'll refund your original payment method — usually within 5–7 business days.

Please note: items must be unworn or unused and in original condition. Footwear should be tried on indoors on a clean surface. LEGO sets must be unopened. If an item arrives damaged or defective, contact us within 48 hours of delivery and we'll make it right.

Read our full Refund Policy.

100% Authenticity Guarantee

Every item sold by Chant Forge is guaranteed to be 100% authentic. We never sell replicas or counterfeits.

• If you ever believe an item you received is not authentic, contact us and we'll issue a full refund, including any shipping costs.
• Products ship in their original manufacturer packaging whenever available.
• Have a question about a specific product? Email help@chantforge.com — we're happy to help.