The ARC'TERYX men's ATOM LT HOODY jacketis designed to take you to the top of the performance ladder.You'll love it, that's for sure. As a mid-layer or outer layer, this jacket promises protection that matches its composition. With Coreloft insulation in the chest, arms and hood, movement is easy. It's simple, with this material it's like having the insulation of a sleeping bag in a jacket! But be careful, with this model, no heat stroke! Moisture management is provided by breathable Polartec Power Stretch side panels with Hardface technology to help regulate temperature during exercise.Highly compressible, you can store the jacket in a pocket for unparalleled space savings. To unfold it, a quick shake is all it takes to restore its loft.