Abstract: Multiple embodiments of a sleepover bag that includes a sleeping-bag-and-liner combination are disclosed. The disclosed combinations include a detachable liner, having an extension part acting as a pillowcase, adapted to be used along with the sleeping bag to protect the sleeping bag and the pillow and for ease of transportation. The disclosed sleeping bags have at least one window, by opening and closing of which a user can control the inside temperature of the sleeping bags. In some embodiments the sleeping bags may have an integrated pillow.