Arc'teryx Atom Insulated Down HoodyFormally known as the Atom LT, the Atom Hoody is a synthetically filled, insulated hooded jacket which features a zip placket, Arc'teryx branding and a DWR finish. The Atom Hoody is made with Coreloft™ Compact 60 insulation and a features a light, soft Tyono™ 20 face fabric, which is breathable and durable.Stick this under a shell, or wear as a standalone. Just make sure you check the weather.This jacket is a regular fit. I'd go for your usual size.Regular fitZip placketTyono™ 20 face fabricInsulated StormHood™Coreloft™ Compact 60 insulationDWR finishTwo hand pockets with hidden zippersInternal chest pocket with zipWind resistant Arc'teryx Atom Insulated Down Hoody Smoke Bluff