The Big Agnes LOST RANGER UL 15 is a sleeping bag.

Modular, it offers 3 bag configurations to suit all 3 seasons. You can modulate your sleeping bag according to temperature, and choose to sleep with 1 or 2 layers of down. Thanks to its down, it's lightweight, comfortable and thermally efficient. Maximum warmth is achieved when the inner and outer bags are layered, using down quilting to minimize cold spots. Featuring the Big Agnes system, it stays attached to your mattress even when you change positions during the night. Its tightening system adapts to a wide variety of mattress sizes, and its self-adjusting drawstring easily connects the bag to the bottom protection. The spacious outer bag features a draft-free collar and 2 draft-free, anti-snag side zippers. With pockets at the top of the bag, your hands benefit from extra warmth for maximum comfort. Integrated into the protective sheet, a pillow case keeps your pillow in place all night long, even when you change position.

The composition of the bag's outer lining and inner taffeta bag is 100% GRS-certified post-consumer recycled polyester with a PFC-free water-repellent finish, so you can be sure of staying dry.