This premium down jacket is made for mountaineering but is suitable for a wide range of outdoor activities. It's made with a premium aeroDownproof face fabric to provide weather protection and durability, and filled with first-class, certified down which offers excellent insulation at a low weight. The face fabric is a windproof Pertex Quantum 30D 100% recycled polyester quality. Pertex uses incredibly fine yarns, precisely woven to provide a very lightweight yet strong and durable fabric. Its softness allows down and synthetic insulation to fully loft, while the downproof construction prevents the down from leaking through the face. The down fill is a high-quality RDS certified 850FP down (287g in men's L/248g in women's M) and we use a box construction. We also use 100g PrimaLoft Gold insulation made with 100% recycled polyester inside pockets and on the shoulder (below the down) to prevent cold spots. Key features include practical hand warming pockets, an insulating hood with one-hand adjustment option, bottom hem adjustment, and an inside pocket. The jacket has a regular fit with a longer cut in the back for extra protection. The Y-shaped fit ensures good mobility.