The outer material is windproof, lightweight and soft Softex NIUS LT DWR PFAS - free and Rip-stop. EU 600 Cuin/oz quality goose down. Light weight compared to the size of the size of the compartment. High thermal insulation. Good packability. Wide cut. H Chamber design reduces cold spots. Specially developed close-fitting hood shape. New collar and drawcord design allow for easy adjustment of the upper perimeter size to suit your needs. "Alpha foot box" bottom shape - beveled trapezoid contours the shape of freely dropped feet when sleeping on your back and enhances comfort. Storage bag and waterproof compress bag included.