Model Name: Men's Nano Puff Jacket Size: XS (Men's) Equivalent to a Japanese size S. It has a sleek silhouette, making it popular as an inner down jacket. Insulation: PrimaLoft Gold (synthetic down) Its biggest feature is that it retains warmth even when wet and can be washed in a home washing machine. [Condition] I used it regularly for several seasons, so there is an overall "worn-in, lived-in feel." It doesn't have the plumpness of a new item, but there are no major tears or noticeable stains. I think the condition is perfect for someone who wants to "use their Patagonia as a tool and wear it out!" [Personal Experience] It's incredibly light and the perfect companion for winter. Unlike down, it uses "PrimaLoft" synthetic insulation, so it's truly reassuring that it stays warm even when wet from rain or snow. Plus, you can easily wash it at home in a net, so even if it gets campfire smells from camping, it's no problem at all! It's thin, so it can be used year-round: as an outer layer in autumn, and as an inner down jacket under a coat or shell in mid-winter. [A Word] I'm selling it at a low price due to closet organization. I would be happy to pass it on to someone who wants to use it without worry, whether as a spare jacket for hiking or camping, or as a warm outer layer for outdoor winter work. Thank you!