The Fortis Marine Liner is a lightweight, hooded, quilted, reversable, packable jacket made with premium Primaloft insulation to provide warmth to below freezing. Multi-functional, the liner's shell is made from a windproof, breathable, ripstop, water repellant polyester. It can be worn as a stand-alone jacket or combined with Fortis' layering system and stows away into its own pocket for easy transportation.