Lightweight: Thanks to its ultra-light down material, the sleeping bag weighs a mere 2.56 lbs (1160 g), equivalent to a 1-liter bottle of water. The shell fabric, zippers, drawstring, and other parts are incredibly lightweight and functionally durable. MORE COMFORT: The nylon lining prevents rustling noises. The hood has plenty of loft and stays in place with a drawstring closure, creating a sweet air hole without letting cold air in around your neck. The wide footbox provides more space and comfort for your feet. ROOMY SPACE: Thanks to its sizeable 32-inch shoulder room and a soft, thick draft collar, the sleeping bag is spacious and comfortable. The extra room is a must for a bigger person, and also benefits smaller folks who are side or stomach sleepers since there’s so much room to move around. You can also use the extra space to keep essentials like a water bottle, power bank, mobile phone, or clothes. WEATHER RESISTANCE: 400T 20D nylon fabric protects against light rain, mist, and frost, and the shell dries out quickly in the sun. Unless you’re sleeping in an inch of standing water or camping exposed to a downpour, you’ll always stay dry in this bag. PORTABLE SIZE: Despite the extra fabric that makes this bag roomy, it still manages to be competitively packable, leaving plenty of room in your pack for other wintertime essentials. This bag packs down to 11.9 x 7.1 in (30 x 18 cm). If space in your backpack is at a premium, this bag is the way to go. 4 season sleeping bag.