Eureka! Spero 30-Degree Regular Length Mummy Sleeping Bag, Three-Season, Orange Trim mummy sleeping bag with a 30-degree F temperature rating and shingle-style construction provides the perfect balance of comfort and performance for extended time on the trail. Eureka! Synthesis technical insulation blends synthetic fibers to optimize thermal performance while remaining ultra soft and ultra-compressible for easy packing. Comfortable, warm-to-touch peached polyester lining fabric combines with a full-length, insulated zipper draft tube with anti-snag guard to defend against the cold. Insulated, anatomic hood design and chin baffles help seal in warmth during the night, while the locking, two-way zipper allows adjustments for ventilation. Regular-length sleeping bag weighs 2 pounds, 6 ounces, and packs down to 7.5 by 15.5 inches in the included stuff sack. Backed by a manufacturer's limited lifetime .