This is the Spring/Summer 2025 model, the Arc'teryx Delta Hoody. It's the latest insulation model using octa. I purchased this new and unused on this site, but the size doesn't fit, so I'm putting it up for sale. *Of course, it's only been tried on, so the tags are still attached.* I've used the octa version of the Delta Peak from the same Delta series for mountain climbing, and it's thin yet warm, with excellent sweat dispersion and quick-drying properties. Also, unlike other manufacturers' octa, it's made very thin, so it doesn't feel bulky when layering, and the sleeves slide on smoothly, which I like. I think it's one of the best active insulation pieces available right now. Size: L Color: Black New with tags *Although it's unused, there appears to be a mark on the tag that looks like it was made with a marker. (This was present when I purchased it new and unused on this site)* Thank you. Color: Black系 (Black-based) Pattern/Design: Solid/One Point Type: Zip Up Stains/Tears/Smells: None #octa #オクタ (octa) #デルタピーク (Delta Peak)