Description of Arcteryx Sigma AR Jacket A hoodless Arcteryx Windstopper Softshell, the pit-zip equipped Sigma AR Jacket is ideal for cold and dry climates. A modern day classic, the trim styling Sigma AR provides four-way mobility in a DWR treated, supremely durable and breathable fabric. This technical Arcteryx softshell offers all weather protection, remarkable fit, and the Sigma AR provides great range of motion. An Arcteryx jacket perfect for mountaineering, ice climbing and ideal for ski touring. Features: AR Stretch WindStopper and Trango Stretch WindStopper Brushed lining Core Venting Internal chest pocket 2 hand pockets