Arc'teryx Atom Vest Men's Mongoose
- Ordered before 16:00, shipped the same day.
- Easy returns and in store exchanges
- Worldwide shipping
The Arc'teryx Atom Vest Men's in Mongoose adds lightweight core warmth while leaving your arms free for walking, climbing and everyday movement. Its sleeveless construction makes sense when a full insulated jacket feels excessive, or when you want a compact layer beneath a waterproof shell. This is synthetic insulation for active use, with a close, uncomplicated shape.
The shell uses Fortius Air 20, a woven fabric containing 88% nylon and 12% elastane. That stretch helps the vest move with you when reaching overhead or adjusting a backpack. The lining shares the same nylon and elastane proportions. Rather than relying on a stiff outer fabric, the construction balances a light feel with the flexibility needed for repeated movement.
Inside, 40 g/m² Coreloft Stretch insulation provides warmth through the body. The polyester insulation continues to offer warmth when damp, which is useful during changeable outings. Octa fleece side panels add stretch and ventilation where heat can build up. Those panels are 100% polyester; they serve a different purpose from the insulated main body and help explain the vest's active layering role.
Arc'teryx describes the cut as Fitted. It stays close through the torso, allowing the vest to sit under an outer jacket without unnecessary bunching. Try it over the base layer or lightweight fleece you intend to wear, and check that the front zip closes comfortably without pulling across your chest. A closer fit should still leave room for normal breathing and shoulder movement.
Two concealed zippered hand pockets keep small essentials accessible, while an adjustable hem drawcord helps reduce draughts around your waist. The FC0 DWR finish encourages light moisture to bead on the surface. It is a surface treatment, rather than a waterproof membrane: carry a shell when sustained rain is likely. The sleeveless design also leaves your arms dependent on your other layers.
For care, follow the sewn-in label: Arc'teryx specifies a gentle cool wash and gentle low tumble drying, without fabric softener, bleach or ironing. Rinse twice and avoid wringing. Choose this vest when you want adaptable warmth across changing activity levels, rather than a heavily insulated standalone winter layer. Compare the other layers in our Arc'teryx collection to build a system around your conditions.
On the move, open the front zip early if you start overheating; keeping your underlying layers comfortable helps the whole clothing system work more effectively.
Features & Specs
- Model: X000009559; colour: Mongoose.
- Shell and lining: 88% nylon, 12% elastane.
- Coreloft Stretch insulation: 40 g/m² polyester.
- Octa polyester fleece side panels.
- Fitted cut; adjustable hem; two zipped hand pockets.
- Published weight: 195 g; manufactured in Bangladesh.
Ordered before 4pm, shipped the same day
Place your order on a workday before 4:00 PM, and we'll ship it the same day. Shipping costs vary across Europe and will be calculated at checkout.
Free shipping thresholds:
- Netherlands: Free from €50
- Belgium & Luxembourg: Free from €75
- Germany & France: Free from €150
- UK, Norway & Switzerland: Free from €350
- Rest of the European Union: Free from €200
- Rest of the world: Free from €750
Return period
You can return items within 30 days. You can do so in our store or by shipping. Items must be unworn, clean, and in their original condition.
The Arc'teryx Atom Vest in Mongoose provides lightweight warmth around your core while keeping your arms free. Coreloft Stretch insulation, flexible Fortius Air 20 fabric and ventilating Octa fleece side panels support active layering. Its fitted shape works beneath a shell, with zipped pockets and an adjustable hem for comfort.
Arc'teryx
Arc'teryx represents unmatched quality, technical perfection, and sustainable design. From GORE-TEX shells to functional midlayers — at BehindThePines.eu, you'll find gear for both city and summit. Discover the gold standard in outdoor performance, built for extremes, loved for its style. For those who never compromise.