Named after an American outdoor destination, the Mad River is the choice for those who value sleeping comfort and low weight. The relatively snug mummy shape and omission of unnecessary features have brought the bags weight impressively low, especially for its price range. The down insulation has been treated with ExpeDry technology, which makes it water-repellent. As a result, the insulation performs far better in damp conditions compared to sleepingbags using untreated down. The treatment also reduces down clumping. Like many other Marmot sleeping bags, this model features a second short zipper on the opposite side of the main zipperallowing you to stick both hands out without letting warmth escape. - Regular size: suitable for users up to 183 cm - Insulated with 455 grams of fill power 650 down - Fabrics are made from recycled fibers - Small accessory pocket inside - Draft collar prevents warm air from escaping - Spacious footbox: your toes wont compress the insula