The Zenith series down-filled sleeping bags are designed and built for high-performance. The Zenith is constructed using a durable, polyester ripstop shell with soft polyester liner and RDS certified 600-fill hydrophobic down. The design features a contoured hood and mummy shape which help seal in warmth. For added heat retention, the Zenith boasts an insulated chest and zipper baffle — keeping the warmth in and the cold night air out. An included compression stuff sack allows the light-weight down bag to compress smaller than other bags so you will have plenty of room in your pack for other gear and essentials. Comfort Rating: 30° Carry Weight: 2 lbs 3 oz. (Reg); 2 lbs 4 oz. (Long) Size: 31" x 80" (Reg); 32" x 86" (Long) Fill Weight: 16 oz. (Reg); 18 oz. (Long)