When talking about
ground cover, David Canterbury says in Bushcraft 101 on page 106, “Any ground pad must be thick enough when
compressed to battle the effects of conduction (equalization of ground
temperature to the body, causing heat loss)”
If you’ve ever noticed, heat tends
to disperse to try and warm everything around it. You can see this when you put
a hot pot on a counter top or a trivet. The heat from the pot disperses into
whatever it is sitting on. The same goes for your body temperature when you lie
on the cold ground. Anything that you cover your body with will trap your body
heat. This is why you wear long johns in the field or long sleeves in the
winter. These clothing items keep your body heat trapped in. On the contrary,
this is why we wear short sleeved clothing items in warmer weather so our body
heat can escape and we don’t become overheated. Your body also needs to be
inclined. There are a couple of ways you can accomplish this such as resting
your head on your pack or on your arms. In other words, your head needs to be
going uphill, not downhill, or lying at 180 degrees. Another important factor
in maintaining body temperature is a good shelter. We talked in a previous blog
about pitching a tarp as a shelter, and if pitched a particular way, it will
protect from the elements as well as trap your radiating body heat inside.
In nature you can make debris beds made of leaves and straw.
The material compressed should be about 4’’ thick (or the size of your fist) to
prevent your body heat from seeping into the ground. You could use a pile of
rocks or a bundle of sticks to incline your head. The main thing is you want it
to be as smooth as possible. You could even take the rocks or sticks and place
leaves or straw over top of them to make it more comfortable to rest your head
on. Debris shelters are built so small and compact. The smaller the area that
is on the inside of your shelter, the better it catches your body heat. Another
way you could build a raised bed, is by using long branches or a hammock to get
your body off of the ground. It is also important to build a big enough fire to
heat your shelter and prevent loss of your core body temperature. However,
since we know that we are going outdoors, we can prepare ourselves by bringing
some items along so we don’t have to worry about trying to do this the natural
way.
The first item that I like to take into the field is a
simple inflatable pool float. I like these because they can be packed
completely flat, can provide you with a pillow, can be inflated manually and
there is no need to carry a pump, I purchased mine at Walmart for about $5.
David Canterbury also said on the same page as the quote above, that he does
not approve of these as they are susceptible to punctures. However, I believe
that if you take the time to clear your site, then you won’t have any issues
with setting these up.
The best way to maintain your heat in the field is to use a
wool blanket. They hold insulation better and are even somewhat water
resistant. They could even be used as an emergency shelter, but wrapping up in
them works best. The biggest downside to wool blankets is that they can
overheat you if you are not careful. You can often find U.S. army and military
blankets at military surplus stores; either the brick and mortar or online
stores. Amazon often carries these items as well, although it is hard to find
one that is over 70/30 (meaning 70% wool). I purchases both of mine on Amazon
for about $30 each.
As we talked about earlier, keeping your head inclined is
very important. In the field I always bring a pillow case. This can be used as
a haversack, kindling pouch, or just a dump bag, and of course you can just use
it as a pillow. In case I can’t find a suitable debris in the wild, I like to
use a child’s arm floaties as an inflatable pillow. You can find one pack of
two floaties is only $1 at Walmart and I simply inflate them and pile them into
the pillowcase to be used as a pillow.
Finally, my 8’x8’ tarp, along with 6 tent stakes and a 12’
section of paracord folded in half with me. With all of these materials I will
be able to erect a tarp shelter with any setup that I choose. For this blog we
will continue to use the plow point setup that we talked about in the last
blog. Click here to check it out.
In the field I basically reverse the processes. Untie
everything and make sure you keep up with your cordage. Pull the wool blanket
off the tarp and onto the ground and set up your tarp in any configuration you
choose. Use your 12’ of paracord as a ridge line or anything else you might
need to complete your setup. Next, unfold the two contractor bags and place
them as the floor of your tarp. Next, it may take you a little time, but you
can begin to set up your bedding by inflating your inflatable pool float. Place
the wool blanket on it and fold it in half. This will allow you to wrap up in
the wool blanket later when you need to. After this you can address the pillows
by either filling your pillow case with debris or inflating your arm floaties.
This took me about 30 minutes to get everything set up how I wanted, the
longest part being inflating the floats.
That is the end for this blog. In a variety of Dave Canterbury videos he talks about how, "A sign of a great woodsmen is their ability to sleep good in the woods." I hope that this blog can help you achieve that. Next week we will be ending this series with a review of a pocket tent. You wont want to miss it. As always feel free to
comment, share this blog, and check back next week for a new one. Follow me on
Facebook: @BPackBushcraft and
on Twitter @BPackBushCraft. Until
next time, keep those fires burning and put another log on for me.
What do you guys think?
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