The REI Halo 10 goose down bag offers the perfect of balance low weight, high-quality materials and top performance-great for backpacking in cool weather. Features premium 750-fill-power goose down insulation, a downproof, partially recycled ripstop polyester shell and lining. Exclusive REI Down Fill Calculator optimizes the amount of down per baffle for the most warmth with the least amount of down. In-the-round design and baffle spacing allows the goose down to remain fully lofted and keeps it from shifting and migrating, preventing the onset of cold spots. Contoured hood, face muffler, trapezoidal foot box, full-length antisnag zipper, and full-length draft tube with ground-level seams all keep body heat in, cold air out. External chest pocket keeps essentials such as your headlamp, watch and glasses right at hand and easy to find in the dark. Differentiated drawcords 1 round, 1 flat let you adjust hood and neck easily in the dark. Pad loops provide attachment points to keep your sleeping bag and pad together, so you neednt worry about rolling off onto the cold ground straps sold separately. European Norm EN is an independent third-party temperature rating, allowing accurate comparisons across brands with other EN-rated bags. Comes with stuff sack and large cotton storage bag.