The lightest weight option in our Ambient line of active insulation, the Ambient 75 Hoodie is designed to breathe when you're in hot pursuit, and keep you warm while you catch your breath. It is body mapped with 75g Primaloft Evolve active insulation and Polartec stretch grid to move with you in silence, and 20D Ripstop face fabric ensures its got you covered through thicket and thin.