Wear by itself or as an added insulation piece - The Co-Pilot Jacket zips into all Frogg Toggs men’s Pilot jackets Made with Frogg Toggs breathable fabric that is water-resistant, wind-resistant, and lightweight acket features a “HT” abrasion-resistant nylon Ripstop shell and 120-gram insulation to keep the wearer warm Zippered hand warmer pockets and an internal pocket provide ample storage Zippered handwarmer pockets provides warmth and ample storage