Excellent Pre owned Condition Great all-purpose light weight jacket Arc'teryx Atom LT Insulated Hoodie - Women's Color: FLUX Size: M Light, soft Tyono™ 20 has good air permeability to help prevent overheating when you're working hard Durable water repellent (DWR) provides the first layer of defense against moisture Coreloft 60 insulation provides warmth in dry or damp conditions Smooth-faced, air-permeable fleece stretch side panels encourage ventilation StormHood™ is adjustable, insulated and low-profile No Slip Zip™ main opening, 1 zip-closure chest pocket; adjustable hem photos coming soon This review sums it up: Bought this jacket on a whim after being ambushed by REI employees at an REI store who all raved about how much they loved this jacket. Expecting to eventually return it, I bought it to placate them. Now, 2 years later, I am still wearing it constantly. They were right. It's 100% breathable, so lightweight that I can barely tell I'm wearing (or carrying) it, and it magically makes me feel perfectly comfortable no matter if its 30-60 degrees outside. It's not windproof, but if it's windy, I wear my shell on top. I can't say enough good things about this. Way better than any other jacket on the market. From a smoke free, perfume free, pet free home