Inspired by the military's ECWCS Gen 1 Parka, Outlier's version retains the core elements of the design such as the jacket's cobra hood and armzip venting while bringing a massive and technical update to the parka's materials. The shell of the jacket is made from densely woven Supermarine Cotton that's breathable and both wind and water-resistant. The jacket is then lined with knit and woven merino wool that's soft to the touch and is also dry and fights odors. Adding to Outlier's constant attention to detail, the company swapped the usual velcro out with a Japanese closure system that is quieter and is less damaging to the fabric. And to keep things extra warm the jacket is insulated with 120gsm Primaloft Infinity.