Down fill, extra roomy and unique construction that lets you use it as a sleeping bag or a comforter. Plus this Big Agnes Diamond Park 15 degrees Sleeping Bag has their Flex Pad sleeve that lets you slide your sleeping pad inside for all-night cushioned sleep comfort. The unique quilt-like construction turns your bag into a backcountry bed plus zip-off option to create a quilt or mummy bag with the Park Series Wedgie (sold separately). Cozy comfort that feels like your own bed even when you're far from home. 600 fill power RDS DownTek insulation Flex Pad sleeve accommodates both 25 inch and 30 inch pads (pad is required, sold separately) Cut tall and wide for taller campers/more room to move Double zippers allow entry from either side of bag, or use like a comforter Use the top corner hand pockets to wrap the bag around your shoulders like you do with your comforter at home Water-repellent shell fabric and lining with PFAS-free finish Comfortable free-range hood design gives you the freedom to lift your head while still covered Easily un-cinch the hood with one hand using low-profile cordlock Pillow stays in place throughout the night with integrated Pillow Barn Double zippers allow entry from either side of bag and when unzipped allows top of bag to be used like a comforter, with top and bottom zippers for maximum venting Internal mesh stash pocket for phones and other small necessities No-draft collar, no-draft wedge, no-draft zipper Secure sleeping bag liners with interior fabric loops and easily hang dry or store bag with exterior loops Storage sack and stuff sack included Order today!