In handing out its 09 Best of Adventure Gear award for a sleeping bag, National Geographic Adventure posed, The years best news for campers? Finally, sleeping bag temperature ratings we can trust.. REI has adopted European standard for all its mummy bags rated above 0 F. That means its ... Halo 25 really is comfortable down to 25 degrees. Honesty. What a concept .. Our premium 3-season down bag offers the perfect balance of low weight, high-quality materials and top performance-great for backpackers and ultralight adventurers. 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, anti-snag zipper, and full-length draft tube with ground-level seams all keep body heat in, cold air out. External chest pocket keeps essentials-headlamp, watch, 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 onto the cold ground straps sold separately. European Norm EN comfort rating allows direct comparison with comfort ratings of any other EN-rated bag. Comes with stuff sack and large cotton storage bag.