Genuine Arc’teryx Thorium Hoody with helmet compatible hood. Insulation & Warmth: Packed with 750 fill-power grey goose down that is Responsible Down Standard (RDS) certified for exceptional warmth-to-weight. Down Composite Mapping™: Places synthetic Coreloft™ insulation in the hood, cuffs, and underarms to manage moisture, while down is used in the core for maximum heat. Shell & Durability: Constructed with Arato™ 30 nylon, a lightweight and durable shell treated with a DWR (Durable Water Repellent) finish to repel light precipitation. StormHood™: Adjustable, low-profile, and insulated for added protection without restricting vision. Very Warm insulated puffer with a fitted hood. Full front zipper for easy layering. Vertical hand pockets with zipper closures. Lightweight, quilted down construction. Subtle Arc'teryx logo on chest. This keeps you warm with just a t-shirt on into the Teens Fahrenheit!!!! If you wear an XL, this jacket would give you room to layer if you’re going to be in an extreme climate