Coleman® 2-In-1 Hybrid Sleeping Bag 2-in-1 convertible design lets you switch between a hybrid bag...  When temperatures can jump from 30 ⁰F to 70 ⁰F, the Coleman® 2-IN-1 Sleeping Bag is your go-to sleeping solution. In warmer weather, leave the bag in its hybrid form, and vents on the side and foot will provide ventilation to help keep you cool while you sleep. and a mummy bag  If the temperature drops, simply turn the bag into a mummy. Versatile range for temperatures 30 ⁰F to 70 ⁰F Memory foam-lined pillow pocket  For extra head support and comfort, insert the included inflatable pillow into the memory foam-lined pocket. Zippered Vents  Side and foot zippered vents let you adjust airflow for custom comfort.