Marmot Mad River 30 Sleeping Bag Sleep Well Out There After a big day on the trail, a good bag is non-negotiable. The Mad River 30 is a down mummy bag with a 30degF rating, aimed at three-season backpackers who want real warmth in a package that doesn't punish you on the approach. The down is treated with Expe Dry, a permanent, chemical-free process that helps it dry fast and hold loft even when humidity and condensation work against it. Two zippers give you full ventilation control without wrestling with the bag in the middle of the night, and the wrap-around footbox keeps your feet warm without boxing them in. A stash pocket, a storage sack, and a compression sack are all included so you're ready to go straight out of the box. Features RDS-certified 650-fill-power duck down with Expe Dry permanent, chemical-free treatment helps down dry fast and maintain loft in wet and humid conditions Full-length left-side 2-way zipper with anti-snag slider precise ventilation control and easy entry and exit Short right-side zipper fold-down comfort and additional ventilation when temps climb Anatomically designed wrap-around footbox warm, roomy comfort for your feet without restricting movement | Marmot | Mad River 30 Sleeping Bag