Folks familiar with brand believe Thorium, thank you! Don’t live somewhere harsh enough to keep anymore. Down jacket - not sure line name (e.g. gamma or atom - an example, I know this jacket is not one of those). Stuff sac in inner pocket - please see photo. No wear or stains. Measurements made lying flat. Pit to pit: 20in Shoulder to bottom hem: 26.5in Width at bottom: 22in Sleeve: ~20in from pit to cuff.