The Atom LT and SL products have non-locking zippers by design, making them easier to operate with one hand. This design feature also helps to limit the possibility of damage to the zipper and lightweight adjacent face fabric.

The Atom SL Vest delivers minimalist warmth appropriate for higher output and milder conditions. A lightweight Tyono™ 20 shell delivers durability and wind resistance, and Coreloft™ Compact insulation is compressible, dries quickly, and allows for airflow. Lightweight air-permeable fleece side panels provide ventilation with thermal performance. Composite Mapping is used to place materials and insulation in the areas that provide maximum benefit.

• Tyono™ 20 denier shell with DWR treatment - 100% nylon
• Torrent™ 190 with Polygiene®- 84% polyester, 16% elastane – side panels
• Coreloft™ Compact 40 insulation (40 g/m²). Highly crimped, multi-denier siliconized polyester yarn that has undergone a special process, which reduces the thickness of the material by 50% without reducing its insulation value by the same amount. Lightweight, breathable, thermally efficient 100% polyester fiber
• Atom: Versatile synthetic insulated mid-layers with a high degree of weather resistance.
• Superlight materials and design, emphasizing lightweight and packability over durability.
• Arc'teryx Essentials: Versatile high-performance designs for diverse activities and conditions. Durable and light.
• Synthetic Insulation: Manmade insulation with quick dry times and durability retains warmth when damp.
• Moisture-wicking
• Breathable
• Compressible and packable
• Wind resistant
• Ultralight
• Breathable, stretch side panels for enhanced comfort and mobility
• DWR (Durable Water Repellent) finish repels moisture
• Composite Mapping Technology strategically places each fabric for the most effective protection and climate management
• Trim fit for base layer or light mid-layer use
• Mid-height collar layers easily
• No Slip Zip™ front zipper
• Adjustable hem cord seals out drafts
• Two hand pockets with zippers
• Weight: 155 g / 5.5 oz.
• Fit: Trim fit
• Center back length: 73 cm / 28.75 in.
• Activity: All Round
• Imported