For $10, kids’ sleeping bags are primarily rectangular designs, only for indoor use. If you spend $40 for a sleeping bag, you can get either a rectangular or mummy bag for indoor or outdoor use.

A rectangular liner won’t fit inside a mummy sleeping bag, so you need a specially designed mummy liner. However, mummy sleeping bag liners fit in most rectangular sleeping bags.

I recently started camping again with my son, and I need a new down sleeping bag. Mummy bags feel too tight, so I’m leaning toward a rectangular shape, even thought they’re heavier.

The rectangular shape of this sleeping bag allows for elbows, knees, and feet to move around more freely. And with a length over 7 feet, this bag is comfortable even for tall sleepers.

If so, then a bag like The North Face’s Bright Sky 3D might work well. It’s a semi-rectangular bag, meaning it’s bigger than a mummy but not as a big as a full rectangular bag.

A one or two-season sleeping bag with a synthetic filling can be found for less than $50, whereas a four-season, down-filled sleeping bag may cost in excess of $200. Lightweight sleeping bag FAQ ...

Fall is the perfect time to fit in a last few camping excursions under the stars—or by the glow of the big-screen TV in the family room, for the less rugged among us. Manny Polloni, owner of American ...

A rectangular liner won’t fit inside a mummy sleeping bag, so you need a specially designed mummy liner. However, mummy sleeping bag liners fit in most rectangular sleeping bags.