Q. I mostly do warm-weather camping, but sometimes I go on winter camp-outs. I can only afford one sleeping bag, so can you recommend one that would work for both?
— Sleeping bag-less Seth, St. Louis, Mo.
A. Finding one sleeping bag that can do it all is tough, but I know of a really cool bag that might fit your needs. It’s the Mountain Hardwear Flip. It’s well named, because each side of this bag is made with a different thickness of synthetic insulation — one side is rated for mild weather (40 degrees), the other for cold nights (rated to 25 degrees). When it’s cold you simply flip the warmer, thicker side up. Warm night? Flip it over with the lighter side on top. At 2 pounds 14 ounces the Flip isn’t exactly ultralight, but it’s suitable for backpacking, totally comfy and expecially handy since it’s like two bags in one. ($100; mountainhardware.com)