Made for climbers – but not limited to rock and ice – the Proton Hoody is the go-to breathable insulation layer for high-output mountain missions. 80gsm PrimaLoft Gold Active Vent insulation works with the air-permeable face fabric and liner to regulate temperature and vapour build-up. The Fortius Air 20 nylon shell is light and durable, articulated patterning removes restriction, and a helmet-compatible insulated hood extends the warmth.

Updated with a PFAS-free DWR (Durable Water Repellent) treatment, Fortius™ Air 20 face fabric with 42% recycled nylon, and PrimaLoft Gold Active Vent insulation for improved stretch and breathability.

Features & Specs

Technical Features

• Moisture-resistant outer face fabric
• Breathable
• Lightweight
• Wind resistant
• Air permeable

Construction

• Fortius™ Air 20 face fabric effectively balances air permeability and weather resistance with lightweight durability
• PrimaLoft® Gold insulation regulates temperature, performs if wet, and is made from 100% recycled materials
• Breathable 20d plain weave Toray liner allows airflow and is made with recycled content

Cuff & Sleeves Configuration

• Knit cuffs add comfort and style

Design & Fit

• Fitted, with articulated patterning for mobility and comfort
• Garment Centre Back Length: Size M is 30"/77cm - Varies by size

Fabric Treatment

• FC0 DWR (Durable Water Repellent) finish repels moisture and is PFAS-free

Hem Configuration

• Dual lower hem adjusters

Hood Configuration

• 60gsm PrimaLoft® insulated helmet-compatible hood provides additional warmth

Pocket Configuration

• Two hand pockets with zippers
• Single stretch woven zippered chest pocket

Sustainability

• Contains materials that meet the bluesign® criteria
• PFAS (Per- and polyfluoroalkyl substances) Compliant

Zippers & Fly Configuration

• No Slip Zip™ prevents inadvertent opening

Size XS, S, M, L, XL, XXL

Weight 415g / 14.6 oz

Fit Fitted

Sizing chart

Men's 

Jacket/shirt sizing chart - new sizing

Your body measurements in centimetres

Size	Sleeve	Chest	Waist	Hip
XXS	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 Alpine/Freeride/Resort

Model X000008436

Manufacturing facility Youngone (CEPZ) LTD, Bangladesh

 

Fit & Sizing

Fit: Fitted

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.

 

Materials & Care

Materials

• Synthetic Insulation: PrimaLoft Gold Insulation Active Vent, 60gsm - 100% Polyester
• Synthetic Insulation: PrimaLoft Gold Insulation Active Vent, 80gsm - 100% Polyester
• Lining: 20d recycled nylon plain weave, 42gsm, w/ Cire - 100% Nylon
• Body: Recycled 20d nylon plain weave weft stretch FC0 DWR, 58gsm - 88% Nylon, 12% Elastane
• Origin of fabric: TAIWAN
• Origin of dying: TAIWAN
• May release plastic microfibres into the environment when washing

Care

• Machine Wash 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
• Front Load Washer Recommended
• Use Mesh Bag For Top Load Washer