MontBell's world patented Super Stretch™ System provides a night's sleep unlike any other. Durable elastic stitching in the baffles of the sleeping bag provide unmatched freedom of movement while simultaneously drawing the insulation closer to your body minimizing dead space to be heated throughout the night. Features: Super Stretch™ System Multi-Box Construction: engineered to maximize the warmth of the insulating material. Partitions have been created inside each baffle to more effectively distribute the down and limit migration. Neck Adjuster: a drawstring adjusts fit around neck Neck Baffle: a shoulder collar prevents air circulation through top of the bag Draft Tube: a single draft tube prevents air from circulating through the zipper Foot Adjuster: a drawstring has been added to the last baffle, allowing the user increased adjustability. Auto Locking Zipper: a locking mechanism has been integrated to limit zipper "slip" during the night. Cotton storage sack included Specs: Temperature Rating: 25 F / -4 C Fill Material: High quality 800 fill power down Shell Material: 15-denier Ballistic™ Airlight fiber nylon Treatment: POLKATEX™ DWR treatment Max User Height: Reg (5ft 10in), Long (6 ft 4 in) Inside Shoulder Girth: Reg (53.2" – 70.9"), Long (56.7" – 75.6") Inside Knee Girth: Reg (42.8" – 57.1"), Long (47.3" – 63") Stuffed Size: Reg (5.8" x 11.5"), Long (6.3" x 12.4") Weight: Reg (1 lbs 12 oz), Long (1 lbs 15 oz) Fill Weight: Reg (14 oz), Long (15.4 oz) Color: Sunflower