Standing on the summit of a Colorado 14er during a 3-day backpacking trip. From right, the Arc’teryx Cerium, Arc’teryx Alpha Lightweight, and Arc’teryx Beta SL.OverviewI own dozens of Arc’teryx items, primarily jackets. This includes all jackets under the Proton, Atom, Nuclei, Alpha, Beta, and Gamma lines. I also own a Cerium, a Thorium, and a … Continue reading Best Arc’teryx Jacket | Temperature ratings + much more