Ultralight Backpacker Asym - Owner Review
Name: Richard Seabury
Age: 36
Gender: Male
Height: 5' 11 ¾" (180.3 cm)
Chest measurement: 40" (101.6 cm)
Waist measurement: 32" (86.4 cm)
Weight: 11 Stone (154 lbs or 69.85 kg)
Email address: richbackpack at phonecoop dot coop
County, Country: Shropshire, England
Date: October 5, 2004
My 'Backpacking Background' details
can be found at the end of this report
Product information
Manufacturer: Hennessy Hammock
http://www.hennessyhammock.com
Model: Ultralight Backpacker Asym
Year of manufacture: 2003/2004
Manufacturer’s weight: 1 lb 15 oz (875 g)
Measured weight: 880 g (using analogue post office scales)
Manufacturer’s length/width of hammock: 100” x 48” (254 cm x 122
cm)
Measured length/width of hammock: 96” x 57” (245 cm x 144 cm)
Manufacturer’s length/width of tarpaulin: parallelogram short
side 65" (165 cm) long side 87" (221 cm) short diag 85" (216 cm) long diag
130" (330 cm)
Measured length/width of tarpaulin: parallelogram short side 65"
(165 cm) long side 92" (233 cm) short diag 104" (265 cm) long diag 126" (319
cm)
Cost: GBP 84.99 (USD 169.95 or EUR 123)
Product Description
This hammock comes in two main pieces: a) a hammock
with a sewn-in netting and, b) a tarpaulin that hangs over the hammock.
I shall refer to these two components as ‘hammock’ and ‘tarp’. The
hammock suspends from two cables sewn into the hammock ends (e.g. "cables
on"). While a third, thinner cable runs through the inside of the
hammock, and over the user’s head, keeping the netting aloft. This
netting is made of a fine black nylon gauze that keeps even the smallest
insects outside. The only way insects can breach the hammock is through
going the only entrance of the hammock, a slit edged with Velcro running
across over a third of the base of the hammock. This entry slit is
quite ingenious as it snaps shut (just as the manufacturer claims) to keep
intruders out and the user in the vast majority of the time.
The tarp is made of silicone/nylon material and clips onto the outer
cables lengthways whilst two black cords secure the tarpaulin widthways.
The hammock also has two cords that secure, and expand, it widthways.
These differ slightly from the tarp’s cords as the hammock cords are elasticated.
The reason for using elastic cords for the hammock is to compensate for
the side to side rocking of the hammock when it is in use. The product
comes also with two black webbing straps (140cm or 55"). These protect
the trunk of the trees so that the cables are attached to the webbing straps,
which are wrapped around the tree trunk. Therefore no cables come
in contact with the tree or dig into its bark.
Field Information
I have spent 10 nights inside this hammock this
year. I chose not to use the word ‘sleeping’ with my experience of
this hammock, the only hammock I have used, as this would be misleading.
Although the manufacturer’s literature claims that the user can sleep
diagonally within the hammock, i.e. head laying to the left of the centreline,
feet to the
right... (See image left)
In theory this position sounds easy to achieve, but in practice I found
this holding this position impossible. Instead of “keeping my back
straight and level”, as the writing outside the bag suggests, I found myself
to gravitate to a permanently bent position. I considered myself to
be within the recommended size of the user 5’11¾” (1.80 m), I have
received feedback from helpful hammock buffs that my sleeping experiences
with this product is due to myself being over the recommended height size.
I have been recommended that I might like to instead buy the Explorer Ultralight
Asym (an extra 5 oz / 142 g heavier). Alternatively, I am told that
I could send an email to Tom Hennessy (the inventor of the product) to see
whether I can get my hammock swapped for this longer one. I'm going
to try the latter!
In addition to this poor posture, I found myself on several occasions
to have slid towards one or other of the hammock ends upon opening my eyes.
This can be accounted for the amount of times I was forced to utilise trees
on banks or hillsides. One helpful BackPackGear Tester suggested
taking along a small, light and inexpensive ‘line level’ or bricklayers’
spirit level tool (see image below)
This aided me to gauge what level to fix
the hammock on trees growing on different levels. This gave me some
help. However, considering that using the level means that I had to
adjust the webbing straps many times in order to get a level hammock.
All of this made 
me feel that the manufacturers claim for the hammock to be set up in 2
minutes as rather idealistic and unbelievable. A second BackPackGear
Tester suggests that I can also solve the problem of ‘slipping’ by setting
my hammock “slightly feet high” instead – I shall try out this simple method
the next time I use this product.
To compound my frustrations in not being able to
set up the hammock effectively or sleep in it satisfactorily I found the diagram
and instructions printed onto the outside surface of the products drawstring
bag wholly incomprehensible and inadequate. Looking around at the other
tester experiences of this issue, thankfully at least I see that I am not
alone here. In order to fully understand the correct way to secure
the cable to the webbing strap I had to first watch, and follow, a video
that can be found on the manufacturer’s web site with just a little searching.
In following the video a couple of times, I found
that I could secure the cable to the webbing in the way instructed (a series
of loops, not knots) quite easily. After a little practice, I found
that I could carry this out within seconds without looking. This would
prove useful as almost half of my walks to the proposed camp went well over
the expected time.
Initial Test
Starting my first test and looking for a good place
to set my hammock. I began to remember that although the manufacturers
claim that the hammock user does not have to need to find flat, comfortable,
level ground. The advertisements however, conveniently forget to
mention that looking for these conditions would be replaced by looking
for two strong trees the right distance apart, with a suitable girth to
wrap the strap around either once or twice.
When I did manage to find two suitable deciduous candidates to
use and begin securing the hammock to them, I soon discovered that I needed
to have found trees that were even more suitable. This is because neither
tree had branches that were conveniently positioned to secure either the
hammock or tarp cords. Therefore, I had to improvise using heavy rotten
tree limbs to secure them, and a large rock. The idea of using the
rock was a mistake.
At dawn, I naturally enough reached over in my hammock to find my mobile
phone. Upon not being able to find it in a minute or two I decided
to turn around, face down, on my hands and knees to search a little more
actively. At this point, with the weight shifting around in the tent,
the rock I had chosen to act as an anchor for my hammock cord gave way.
This set off a classic hammock chain reaction. The manufacturers pride
themselves upon the fact that one cannot fall out of their hammock.
Although strictly true, I found myself flipped sideways, landing on the opposite
side of the hammock, bringing the hammock rolling under me - thankfully the
tarp stayed put. After a minute or so of laughing at the predicament
I found myself in I found myself laying fully on the netting and that the
hammock base and entry slit had revolved high above my feet. Then I
looked through the netting at the ground below to come face to face with
my mobile phone (I mentioned that the entry slit was not completely foolproof).
It took a considerable amount of time and effort to crawl backwards.
I had to stick each foot 1 m (3 feet) high into the air, break the Velcro
seal with my sock, slide my body through the slit and edge myself down
to the earth below. I had decided to get out in this strange manner
rather than turning around inside the hammock to spread my weight in order
not to put undue pressure on the stitches of the netting. To have
done so would have made my job easier – but potentially cause the netting
and seams to give way.
On examination, the hammock and myself came away unscathed. However,
looking at what contortions I had to put myself in, a relatively fit person,
I realised that a less fortunate person might have come away from the experience
far less happy, if at all.
On my second and subsequent trips, I decided to allow a little more weight
and bring along some tent pegs from now on. On the second and third
nights using the hammock I, thankfully, did not have such an experience.
Instead, I experienced being let down by the hammock in another way.
After a friend of mine who did not speak English had broken some bones,
I had needed to visit the local hospital, until late. Because of this,
I had no option but to find and secure my cables onto a couple of deciduous
trees in very little light. As I entered the hammock to get some
much needed sleep I felt the cable of the hammock drop a little and perhaps
gently, gently I felt the hammock drop again as I moved. Waking in
the morning, I soon discovered where my hammock had been situated, next
to the local zoo – I had heard lions roaring through the night. My
first view outside of the hammock through the netting was an ornate bird
looking at me through the bars. I also discovered that my hammock
was barely 3 inches (76 mm) off of the ground – instead of the 3 feet (1
metre) that I had set it up to be...
This unfortunately was again experienced the next morning – I had
to hang my hammock the same place at the same ungodly hour because of another
trip to the hospital with my friend.

On the third night, I was able to pitch my tent in between two trees
within a long, deep hedgerow. However, although I luckily did not
open my eyes in the morning to discover that I had dropped to the ground;
instead, I was rudely awoken by rain. In order to see out of the hammock
properly, as ever, I decided to set the tarp of the hammock horizontally
as the picture below shows.
Unfortunately, both wind and rain set in that night
and my hammock was whipped around in the trees like a boat. I was happy
to sit it out listening as the rain turned the tarp into a snare drum - as
long as the wind did not drive the rain underneath the tarp. However,
within minutes, the wind began to purchase and play on the wrinkles that
in my experience always gather lengthways in the tarp (see photograph above).
I took at least some wonderment in watching the tarp flapping for many minutes.
Then the tarp raised in one magical tsunami-like action and whipped down
with an incredible aim, full of rainwater, shooting a mass of fresh liberating
water through the netting and onto my shocked face below.
Observations
Through reading other Tester’s reports I had concluded
that one secret to having a good night’s sleep was to find the right foam
pad. Upon using my old, narrow 10-year-old foam pad to little success
(before I had begun to use the line-level), I chose to buy a new, wider
pad. In local stores, I had found that the widest pad I could find
was a bright yellow foam pad made by Karrimor. This seemed to have
more adhesion to the hammock’s inner surface, of which I was pleased, and
also gave me greater warmth as I found that at no time had my arms rested
upon the bare hammock wall or floor. I used this pad once more until
I accidentally went on a short trip without any pad at all. I decided
not to head back but to carry on, happy in the belief that if necessary I
could always lay on my empty rucksack inside the hammock. That night
with the whole of my torso resting on my rucksack I discovered that the rucksack
had not moved all through the night and had kept me at a far more bearable
temperature than either of the foam pads. To top that I had left my
tarpaulin high up in the horizontal position and had seen a roe deer pass
within 30 feet (90 m) of my hammock.
A further bout of experimentation with the hammock came about, or rather 
was forced on me, on the last night of a three-day walk. This
time I found myself high on a ridge walking with a friend, the light was
fading and with no sign of a tree. The only thing I could think of
doing was to create a bivouac from my hammock, as I had read in other Tester’s
reports - using walking poles. Fortunately, though I noticed a line
of large, disused, weather-beaten fenceposts. (See image to the right
)
I began to suspend the hammock from the fenceposts, but upon discovering
that the posts were rotten, I decided to secure it low and rest my body
weight again on my covered empty rucksack on the ground but under the hammock.
A further addition to my hammocking experience came in the form of buying
two Hennessy Snakeskins. Retailing at GBP 12.99 (USD 19.95).
They come in the form of two open-ended tubes, are made of the same material
as the tarpaulin. These small and very light additions to my hammock
now permanently sit over the support cables, complementing the hammock
completely. The Snakeskins make setting up and taking down the hammock
far easier and quicker. These ‘skins’ are able to make such a difference
by allowing the hammock to be converted into a far easier to handle hammock-length
sausage when setting up the hammock and taking it down. See image
below
Conclusions
Although I have obviously come across some big problems in practice,
I have a great deal of fondness for the product. I feel I can appreciate
how much vision and effort has been put into the design although I seem alone
in not being able to sleep in it. There are some nice touches, such
as a net bag the size of a small pencil case that hangs from the cable inside
the hammock, and the quality of the stitching even after putting the hammock
through some hard tests. Other than the broken carabiner – purely
my fault, no other part was damaged.
A strong and obvious reason for sticking with the hammock has been due
to the compact size and weight of the hammock in comparison to using a
tent. If I find that I cannot find a way to get adequate sleep (i.e.
2+ hours each night) I shall choose to find another product. However,
for the time being I will persevere with this product.
Backpacking Background
I started backpacking in late teens both as a form
of getting around and to see the country. Regular day backpacking excursions
most weekends, any serious trips (i.e. 2-10 days) restricted to time and
weather, but on average travel two or three times a year.
I have experience hiking both with incredibly full packs and minimal
kit. I am extremely keen in paring down the weight of my kit to a
minimum, getting the best comfort value and obtaining good quality equipment.
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