Hammock Camping – Part II: Types of backpacking hammocks, and spec comparison to ground systems

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http://andrewskurka.com/2012/hammocks-types-ground-system-comparison/

Short-term, low-risk outings are ideal for discovering the optimal applications for and extreme limitations of gear, supplies, and skills. If the test succeeds, the lessons can be integrated into longer and riskier itineraries; if the test fails, at least the misery was short-lived and non-consequential. This past year I used such opportunities — specifically my intro-level 3-day/2-night guided trips — to finally experiment with hammock systems, which had piqued my curiosity while writing The Ultimate Hiker’s Gear Guide because I knew little about them despite their fanatical cult following. When my colleague Alan Dixon first saw my hammock in North Carolina, he immediately saw its potential and committed himself to this experiment, too. Based on his new first-hand experience, he has submitted a three-part series on hammocks:


By Alan Dixon There are two main hammock designs on the market:

  1. Gathered End Asymmetric Hammocks
  2. Bridge Hammocks

The sleeping position of both designs is relatively flat, not banana-shaped as customarily found with backyard furniture hammocks. Both designs normally feature integrated or removable no-see-um bug netting. Finally, additional components are usually needed to complete a hammock system:

  • Tarp for protection against rain and wind
  • Sleeping quilt, worn atop the sleeper, to reduce convective heat loss
  • Under-quilt, secured below the sleeper usually on the outside of the hammock, to reduce convective heat loss

Gathered End Asymmetric Hammock

This is by far the most prevalent camping hammock design. It is named for its two most distinct features:

  1. Its ends are gathered into a single bunch, and
  2. It has an asymmetric shape (i.e. not symmetric) that allows the sleeper to lay diagonally to its center-line, which is a flatter sleeping position than the banana-shape of the center-line.

It’s important to note that the diagonal sleeping position is enabled not just by the asymmetrical cut, but by the width of the hammock. An excessively narrow hammock, even if it is asymmetric, will not have enough material for a flat-ish sleeping position. There are two main advantages of a gathered end asymmetric hammock over the other common design, the bridge hammock (discussed below):

  1. Lighter weight
  2. Rommier, less constrictive feel

Bridge Hammock

This design uses flat, non-gathered ends that are reinforced with a spreader bar. The resulting hammock shape is more of a flat, trough-like half-tube, versus the curved banana-shape (but not sleeping position) of a gathered end hammock. The bridge hammock provides a flatter sleeping position than the gathered end hammock, with less fuss and body adjustments, too. However, it has two potential drawbacks:

  1. The spreader bars add weight to the system; however, most designs allow trekking poles to be used as substitutes.
  2. Some sleepers may find that its tubular shape is more constrictive.

About those under-quilts

To insulate themselves against the ground, which will steal heat from a ground sleeper through conduction, ground sleepers use closed-cell foam pads or air mattresses. Hammock sleepers can also lose heat from their underside, but due to air convention, especially if there is a wind. There are two options for reducing this heat loss: 1. Use a double-layer hammock to capture and control the ground-pad. The pad is inserted between the two layers of fabric. This extra layer of fabric adds weight, but it will securely fix the ground pad in place. Double-layer hammocks are popular for this reason. 2. Use an under-quilt. A better solution is to use a hammock-specific under-quilt, which increases the warmth and comfort of a hammock. It also increases the weight and expense of a hammock system, but by no more than would a NeoAir mattresses from Therm-a-Rest, which are extraordinarily popular with ground sleepers. As an added perk, you will not get dizzy inflating an under-quilt.

Hammock specs compared to ground systems

How much does a hammock system weigh and cost? And how does the weight and expense compare to conventional ground systems? As explained in Part I of this 3-part hammock series, it’s very difficult to compare hammocks and ground systems. Each system has several popular designs and an almost infinite number of configurations; there is no “standard.” Moreover, it’d be a challenge to find two systems that offer the exact same features and user experience. Nevertheless, I have tried, below. Each system offers a standard level of protection against rain, ground water, wind, and bugs. Each system also includes underside insulation, through either an under-quilt or a sleeping pad. Topside insulation (i.e. sleeping quilt) was not included into the weight or expense of these systems because this component would not change across systems. The conclusion you should reach is that hammock systems weigh and cost about the same as “comparable” ground systems, with a slight edge to ground systems in both regards. This advantage, however, is not substantial, and probably other considerations — such as where you normally backpack, whether you want a one-person or multi-person shelter, if you have already invested in gear that is optimal for one system or the other, and if you are struggling to sleep well with your current system — will drive decisions about whether you are better off with a hammock or ground system.

Gathered end asymmetric hammock system

  • Blackbird Hammock, including webbing suspension ($190, 21 oz)
  • Yeti 3-season under-quilt ($190, 12 oz)
  • Edge Tarp with guylines and four stakes ($85, 13 oz)

Total: $465, 46 oz (2.9 lbs) Based on Warbonnet Outdoors products and pricing

Bridge hammock system

  • BMBH Hammock (UL) , including webbing suspension ($190, 23 oz)
  • Trekking poles (as substitute for spreader bars)
  • Greylock, 3-season under-quilt ($190, 14 oz)
  • Hex Tarp with guylines and stakes ($100, 16 oz)

Total: $480, 53 oz (3.3 lbs) Based on Jacks ‘R’ Better products and pricing

Ultralight hammock system

  • Dream Hammock Darien UL, including suspension hardware ($180, 13 oz)
  • Hammock Gear Phoenix 3/4-length, 3-season under-quilt ($144, 9 oz)
  • MLD Cuben Hex Tarp with guylines and stakes ($300, 10 oz)

Total: $624, 32 oz (2.0 lbs) Based on Dream HammockHammock Gear and Mountain Laurel Designs products and pricing

Tarptent system

  • Tarptent Contrail  ($225, 24 oz)
  • Guylines and stakes (included, 2 oz)
  • NeoAir, Air mattress ($160, 12 oz)

Total: $385, 38 oz (2.4 lbs) Based on TarpTent  and Therm-a-Rest products and pricing

Ultralight tarp/bivy system

  • Gossamer Gear SilTwinn Tarp with guylines and stakes ($175, 16 oz)
  • Closed-cell foam sleeping pad ($20, 5 oz)
  • Moutain Laural Designs Water-resistant bivy sack ($170, 8 oz)

Total: $365, 29 oz (1.8 lbs) Based on Gossamer Gear and Mountain Laurel Designs products and pricing