The Everest Micro's lightweight and compact size make it ideal for summer camping, travel and trekking trips or use it to boost the thermal rating of other sleeping bags for winter camping. Invista Thermolite is used in this extremely packable and very comfortable bag. May be zipped together with other compatible bags. Thermolite by Invista delivers maximum lightweight warmth in extreme conditions. Specifications: - Size: 89" x 32" x 22" - Shape: Mummy - Construction: One layer - Outer Shell: Soft ripstop nylon - Lining: Pongee Classic - Filling: 12.4 oz. of Invista Thermolite - Zipper: #5 YKK 2-way - Stuff Sack: 4-way compression bag - Total Weight: 2.4 lbs.