Details The Women's Atom SL Vest from Arc'teryx is a super light and incredibly packable vest that's thinly insulated for cool days. The front and back are insulated with Coreloft™ Compact 40 that's breathable, compressible, and quick drying. The outer nylon shell is breathable as well as wind and water-resistant while the sides of the vest are made from a lightweight stretch fleece that offers increased ventilation and freedom of movement. This unique design offers warmth and weather protection for your core while letting excess heat and moisture escape. It's great for everything from hiking to casual daily use and can be packed down to about the size of an apple when not being worn! Material bluesign® Approved Stretch Fleece Side Panel: 93% Polyester, 7% Elastane Tyono™ 20: 100% Nylon Permair™ 20; 100% Nylon Lining (select colors) Dope Permair™ 20: 100% Nylon Lining (select colors) Coreloft™ Compact 40 insulation (40 g/m). 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. Fit Trim Fit Hip Length Center Back Length: 66 cm / 26 in Slight drop hem Details Moisture-wicking Breathable with stretch side panels for enhanced comfort and mobility Insulated with Coreloft™ Compact 40 synthetic insulation Compressible and packable Wind resistant Ultralight Trim fit for base layer or light mid-layer use Tall fleece-lined collar No Slip Zip™ front zipper Adjustable hem cord seals out drafts Two hand pockets with zippers Contains materials that meet the bluesign® criteria DWR (Durable Water Repellent) finish repels moisture Weight 154g Arc'teryx Atom SL Vest Women's