Light, versatile synthetically insulated hoody works as a midlayer and standalone. Atom Series: Synthetic insulated midlayers. | Lightweight.

Alpine proven as a midlayer and standalone, this versatile hoody has warmed climbers and backcountry travelers for years. Built to handle a range of conditions and output levels, the latest-generation Atom LT’s Coreloft™ Compact insulation retains its warmth even if wet and has loft retention to withstand years of packing and unpacking. The water resistant Tyono™ 20 face fabric is breathable and durable, stretch side panels improve fit and freedom, and the insulated StormHood™ adds warmth.

BENEFITS

• ATOM: Versatile synthetic insulated mid layers with a high degree of weather resistance.
• ESSENTIALS: Versatile high performance designs for diverse activities and conditions.
• DOPE DYE: Adding pigment at the polymer level which saves water, reduces C02 emissions and increases fabric colourfastness.
• LIGHTWEIGHT: High performance, minimalist design that is durable for its weight.
• SYNTHETIC INSULATION: Man-made insulation with quick dry times, durability and retains warmth when damp.

FEATURES

Technical Features

• Moisture-resistant outer face fabric
• Breathable
• Insulated
• Lightweight
• Compressible and packable
• Versatile
• Wind resistant

Design & Fit

• Trim fit for base layer or light mid-layer use

Hood Configuration

• Adjustable, insulated, low profile StormHood™ with structured mini hood brim

Cuff & Sleeves Configuration

• Stretch-knit cuffs
• Cuff construction increases durability, eases layering and removal

Pocket Configuration

• Two hand pockets with hidden zippers
• Internal chest pocket with zip

Fabric Treatment

• DWR (Durable Water Repellent) finish repels moisture

Construction

• Resilient Coreloft™ Compact 60 insulation retains loft
• Performance stretch fleece side panels give ventilation
• Light, soft Tyono™ 20 is air permeable

Patterning

• Articulated elbows
• Gusseted underarms for mobility and comfort

Zippers & Fly Configuration

• No Slip Zip™ front zipper
• Custom TPU zipper pulls

Hem Configuration

• Laminated hem
• Slight drop hem
• Dual lower hem adjusters

Sustainability

• Contains materials that meet the bluesign® criteria
• Dope dyed lining fabric

Light, packable and proven, the Atom LT – an Arc’teryx icon – is a performance warming layer for backcountry adventures, alpine ascents and downtown commutes. Refined for its next generation, we elevated its performance and extended its versatility. The Coreloft™ Compact 60 insulation retains heat when wet and withstands repeated packing and unpacking. The soft, durable Tyono™ 20 face fabric resists wind and weather, and stretch fleece side panels improve ventilation and freedom of movement.

Light, versatile synthetic insulated jacket works as a midlayer and standalone. Atom Series: Synthetic insulated midlayers. | LT: Lightweight.

Redesign includes an update to the cuff construction for easier on/off and layering, an updated material package for enhanced durability, updated fit, and a dope dyed liner.

BENEFITS

• ATOM: Versatile synthetic insulated mid layers with a high degree of weather resistance.
• ESSENTIALS: Versatile high performance designs for diverse activities and conditions.
• LIGHTWEIGHT: High performance, minimalist design that is durable for its weight.
• SYNTHETIC INSULATION: Man-made insulation with quick dry times, durability and retains warmth when damp.

FEATURES

Technical Features

• Moisture-resistant outer face fabric
• Breathable
• Insulated
• Lightweight
• Compressible and packable
• Wind resistant
• Versatile

Design & Fit

• Trim fit for base layer or light mid-layer use

Collar Configuration

• Mid-height collar is insulated and fleece-lined, layers well

Cuff & Sleeves Configuration

• Stretch-knit cuffs
• Cuff construction increases durability, eases layering and removal

Pocket Configuration

• Internal chest pocket with zip
• Two hand pockets with hidden zippers

Fabric Treatment

• DWR (Durable Water Repellent) finish repels moisture

Patterning

• Articulated elbows
• Gusseted underarms for mobility and comfort

Zippers & Fly Configuration

• No Slip Zip™ front zipper
• Custom TPU zipper pulls

Hem Configuration

• Laminated hem
• Dual lower hem adjusters
• Slight drop hem

Sustainability

• Dope dyed lining fabric
• Contains materials that meet the bluesign® criteria

Warm weather is never a constant, even in summer. Fog rolls in, a sudden thunderstorm blocks the sun, and changes in elevation and levels of exposure can cause temperatures to suddenly shift. But summer conditions seldom require bulky insulation. The Atom SL Hoody is specifically created to hit the zone where insulation is required, but in a measured amount that suits milder conditions. Providing warmth comparable to a lightweight fleece for significantly fewer grams, the Atom SL is an efficient midlayer in cool conditions and a great standalone during rest breaks, early morning starts, and while enjoying the view from a freshly bagged peak. 

FOCUSED VERSATILITY

The Atom SL is designed to handle subtle climate shifts. Balancing air permeability with wind resistance, the shell material allows airflow during active periods, but helps cut the chill during static moments. 40g/m² Coreloft™ Compact insulation is highly compressible, insulates if wet, and delivers its superior performance for very little weight. All the Atom SL’s fabrics are selected to manage moisture and provide comfort while on the move. Sleeves are lined with a comfortable mesh, and lightweight fleece side panels help provide thermal performance and ventilation. Articulated sleeves and gusseted underarms extend freedom of movement.

FUNCTIONAL MINIMALISM

Arc’teryx designers know that a thoughtful minimalism delivers more performance. Created to be so compact and light there’s no reason to leave it behind, the Atom SL employs only necessary features and ultralight fabrics. Comfortable, easily compacted and resilient, the Tyono™ 20 shell material uses fine denier yarns that allow a fabric configuration that is surprisingly strong for its weight. The DWR (durable water repellant) treated StormHood™ hood is uninsulated, making it ideal for minimizing wind chill or providing protection in light rain. The trim fit minimizes bulk and layers easily, and the insulation is placed only where it’s most needed, in the core, to reduce weight and bulk without sacrificing appropriate thermal performance. The result is a hoody that provides efficient shoulder season insulation, stuffs to the size of a grapefruit, and weighs a mere 260 grams.

The Atom LT Vest is a proven performer across a range of seasons, landscapes and activities. Elevated with advanced insulation and material technologies, this versatile vest delivers its best, most versatile performance ever. Coreloft™ Compact synthetic insulation retains warmth if wet and withstands years of packing and unpacking, and the breathable, durable Tyono™ 20 shell resists wind and light weather. Stretch fleece side panels aid ventilation and freedom, and the entire vest packs into its own pocket.

Light, warm, highly versatile insulation performs as a standalone and midlayer. Atom Series: Synthetic insulated midlayers. | LT: Lightweight.

Redesign includes an updated material package for enhanced durability, updated fit and a dope dyed liner.