The Arcteryx Atom Jacket is a light, versatile, and synthetic-insulated midlayer or standalone jacket. The lightweight wind-resistant and water-repellent Tyono 20 shell is treated for extra durability, and paired with stretch fleece side panels for improved ventilation and freedom of movement. Its Coreloft synthetic insulation retains heat when wet, plus it can withstand repeated packing/unpacking. Warm and breathable, weather-resistant, packable, and durable, the women's Arcteryx Atom Jacket is ideal as a midlayer for resort skiing or as a standalone shoulder-season piece. Light, soft Tyono 20 shell is finished with a durable water repellent (DWR) to repel moisture Resilient Coreloft Compact 60 synthetic insulation for efficient, effective, and resilient warmth Performance stretch fleece side panels for ventilation and movement Stretch knit cuffs for increased durability and easy layering Winter 2023/24 product Equipped With Durable Water Repellent (DWR) DWR is a fabric treatment that improves the water-repellency of the outer layer of the material while maintaining its breathability.