Filled with 3.5 lbs. of Invista Thermolite Quallo coupled with a waterproof, windproof, breathable Bola-Tex Hyperbola outer that sheds frost and wind with a thermal efficiency that makes it perfect for most cold weather use without being heavy or bulky. The Mt. Rainier features a thermal collar, wind shield baffle, two-way zipper and measures 86”L x 22 at the foot and 34” at the shoulders. Two bags can be zipped together (order a Right hand zip or a Left hand zip). Rolled dimension is 19.8”L x 12.3”W. This bag hits the daily double...it will save you from freezing and going broke! You’ve seen bags with half the features for twice the money!