Hiking doesn’t have to be a solitary activity, and in fact, many couples get a great deal of enjoyment from spending time together in the great outdoors. EXPED has recognized this need and designed a bag for you and your +1 with the MegaSleep Duo 25/40—a double sleeping bag that’s built for backpacking. The “Duo” in the name is underselling the versatility of this bag since it’s a 4-in-1; it can act as a 25°F or 40°F double bag, as well as split into two single sleeping bags or blankets. Solo hikers likely won’t get much use out of its transformability. Still, its lightweight construction and compressibility make this a rather creative solution for those who enjoy a good snuggle after a long day on the trail. Our only real gripe was that it could be a bit warmer. It’s somewhat borderline as a three-season sleeping bag but will operate quite effectively in spring and summer.

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Warmth

The dark-blue side of the MegaSleep Duo is rated for 25°F while the light blue is rated for 40°F. When zipped together into the double bag, you’ll want to keep the dark-blue side up for chillier nights and light-blue side up for the warmer ones. EXPED lists the temperature ratings as 42.8°F (6°C) for comfort, 26.6°F (-3°C) for lower limit, and 5°F (-15°C) for extreme. We do not recommend testing the extreme rating of this bag, and even the lower limit could be a hair generous. What we can say is that the bag is much warmer with two people inside it.

Comfort

Weight & Packed Size

We were rather impressed with the weight and packed size of the MegaSleep Duo. The regular double weighs 4.4lb while the long weighs 5lb, which comes in slightly heavier than just one of our budget single bags like the Coleman Brazos and Kelty Callisto 30 (albeit at more than four times the price). Still, the total weight was less than what you’d get from a pair of $100 mummy bags like the Marmot Trestles 30 or REI Co-op Trailbreak 30. When packed into a third-party compression sack, this bag managed a staggering volume of only 14L, just slightly larger than the Agnes Husted 20. We felt this made the MegaSleep Duo more than capable of acting as a backpacking sleeping bag, especially if your partner is hefting the tent.

Features

Though it’s undoubtedly quite versatile, the MegaSleep Duo isn’t particularly packed with features. You’ll find a draft tube running along the entire length of the zipper to stop heat loss, and there’s a central snap near your head end to reduce drafts when sleeping in couples’ configuration. It also comes with a handy storage duffel, but you’ll need to supply a compression sack if you plan to transport this on your back.

The Bottom Line

The fact is that the MegaSleep Duo is targeted at a rather specific market, and for some people, it will meet a very particular need. Solo hikers likely won’t get much use out of its transformability. Still, its lightweight construction and compressibility make this a rather creative solution for those who enjoy a good snuggle after a long day on the trail. Our only real gripe was that it could be a bit warmer; it’s somewhat borderline as a three-season sleeping bag but will operate quite effectively in spring and summer.

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