Single Layer vs Double Layer Backpacking Hammocks

Difference between single layer and double layer hammocks

Many backpacking-style hammocks come in double-layer or single-layer models. How do you decide which hammock to get and what are the consequences of choosing one type over the other?

Double Layer Hammocks

A double layer hammock is so-called because the part you lie on has two layers of fabric. The two layers form a pocket that can be used to hold a foam or an inflatable sleeping pad. The pocket helps hold the insulation in place and gets it out of the living compartment where it can be clumsy to deal with. The second layer of fabric also makes the hammock stronger, so it can hold a heavier person than a single layer hammock.

The double layer hammock has an internal sleeve which can hold a foam or inflatable pad for more back insulation.
A double layer hammock has an internal sleeve that can hold a foam or inflatable pad for more back insulation.

A chief benefit of using a double layer hammock is that you can use inexpensive insulation like closed-cell foam or inflatable sleeping pads with it. Chances are you already own some of these, like a Therm-a-Rest Z-lite pad, a blue foam pad, or an inflatable sleep pad. As it gets colder, you can layer several of these pads in the hammock’s pad pocket for more insulation or use a pad/underquilt combination.

Single Layer Hammocks

In a single layer hammock, there’s only one layer of fabric underneath you. While this makes the hammock lighter weight, it also means that there isn’t a separate pocket to hold additional sleep insulation. While you can try to lie on top of a pad in a single layer hammock, most people find it very frustrating to position properly (since you’re lying on the pad you’re trying to reposition.) The pad may move around and has to be realigned every time you get up at night to pee.

Most single layer hammock users use an underquilt instead, which hangs underneath your hammock to trap your body heat and keep you warm at night. But underquilts are a lot more expensive to use as hammock insulation than foam or insulated pads. You may also want to buy several underquilt that are rated for different temperatures ranges (for example: 0-20 degrees and 40-70 degrees.)

Most of the hammock underquilts available today are made by small manufacturers including Hammock Gear, UGQ, or Enlightened Equipment. Mass-market manufacturers such as ENO, Kammok, and others have also started selling underquilts, but prices remain relatively high.

While underquilts are very comfortable once you dial in your hammock suspension system and they’re highly compressible for packing in a backpack, buying a single layer hammock can be a much more expensive proposition than buying a double layer hammock and using less expensive bottom insulation with it.

While full length quilts are desireable for sleeping in winter conditions, you can save money by using a 3/4 or 2/3 length underquilt in warmer weather.
While full-length quilts are desirable for sleeping in winter conditions, you can save money by using a 3/4 or 2/3 length underquilt in warmer weather.

How to Choose Between Them: Advice

  • If gear weight is your primary concern and cost is less important, get a single layer hammock and a 40 degree underquilt. You can decide whether you want an additional 0 or 20 degree, cold weather underquilt later.
  • If you want to save money, consider getting a 40 degree synthetic insulated underquilt instead of one insulated with duck or goose down. The weight difference between the two is less significant than with a colder weather underquilt, while synthetic underquilts are significantly less expensive and take less time to manufacture. You can also save money by buying a 3/4 underquilt, instead of a full-length model.
  • If the added cost of an underquilt is uncomfortable and gear weight is less of an issue, go with a double layer hammock. Sleeping on a foam pad inside the pad pocket is still quite comfortable and it’s easy to add or reduce the degree of warmth they provide by adding, mixing, and matching pads to meet your comfort needs, affordably.

Editor’s note: Help support this site by making your next gear purchase through one of the links above. Click a link, buy what you need, and the seller will contribute a portion of the purchase price to support SectionHiker’s unsponsored gear reviews, articles, and hiking guides.

See also:

About the author

Philip Werner has hiked and backpacked over 7500 miles in the United States and the UK and written over 2500 articles as the founder of SectionHiker.com, noted for its detailed gear reviews and educational content. A devotee of New Hampshire and Maine hiking and backpacking, Philip is the 36th person to hike all 650 of the hiking trails in the White Mountain Guide. He is also the author of Backpacking the White Mountain 4000 Footers, a free online guidebook of the best backpacking trips in the White Mountains in New Hampshire and Maine. In addition, Philip volunteers as a 4 season backpacking leader for the Appalachian Mountain Club, a Long Trail Mentor for Vermont’s Green Mountain Club, and a Leave No Trace Master Educator. He lives in New Hampshire.

Leave a Reply

Your email address will not be published. Required fields are marked *

8 + seven =