Sleeping Bags

Ninpo Library::Ura & Omote::August 1995::

SLEEPING BAGS

Ron Blackwood

As you progress in your training, you will find yourself out in the wilderness 
on more than one occasion. In our dojo, promotions through the Kyu and Dan ranks 
require certain survival skills. I will direct my articles toward educating you 
"city folks" to the ways of the outdoors and the equipment necessary to make it 
fun.

To me, the most critical item to take with you is the sleeping bag. I don't 
think there is anything worse than freezing my buns off in the middle of the 
night on the hard ground. The following is a short course in the selection of a 
sleeping bag.

There are four types of fill and certain advantages to each: 

HOLLOFIL 808 is a hollow short-crimped polyester fiber. It retains most of it's 
loft when wet. It must be sewn to another fabric to prevent clumping, shifting 
and cold spots. This adds weight. HOLLOFIL II is the same but has a silicone 
slickening agent added to make the fibers more resilient and more compressible. 

POLARGARD is a continuous filament polyester that is manufactured in bats. These 
bats require no stabilizing fabric making the bag somewhat lighter. It too 
retains most of it's loft when wet. 

QUALLOFIL is a four-hole microscopic short-crimped polyester fiber. Since it has 
more surface area, it is a superior insulator. It has a soft down-like feel and 
retains most of it's loft when wet. 

DOWN is the best insulator with the widest comfort range. Look for at least 550 
cubic inches per ounce as a fill guide. DOWN loses 90% of it's warmth when wet 
and will take atleast two days to dry. The synthetics lose only 10% of their 
warmth and will drip-dry in less than a day. Carry your bag in a waterproof 
stuff sack.

There are two styles of bags. The camping bag is rectangular in shape and is 
usually quite bulky. Rectangular bags are usually only good for weather well 
above freezing. The mummy style is less comfortable, but is more thermally 
efficient. The mummy style is excellent at sub-zero temperatures.

Selection of a sleeping bag is a personal decision but should be carefully 
thought out before spend a lot of money on any expensive mistake.

Weight: If you are going to be backpacking, this can be very important. Every 
pound will weigh ten pounds out on the trail. If you drive to your campsite, 
then weight is of no concern.

Temperature Rating: I would rather have a bag that is too hot than one that is 
too cold. If I get too warm, I can always unzip the bag or sleep on top of it. 
If the bag is too cold, there is nothing I can do to warm it up.

Size: I like a bag with more girth. If the bag is too tight then I feel 
constricted. If the bag is too short, then either your feet or your head will 
compress the insulation and either one end or the other will get cold and 
uncomfortable.

Price: A good quality sleeping bag will cost from $80 to $300 depending on the 
construction, fill, shell material, and the store you buy it from. In general, 
you should be able to buy an excellent sleeping bag for $200. I have purchased 
six sleeping bags over the last ten years before finally finding one I like.

Other items to consider are a ground cloth and/or sleeping pad. Both will keep 
the damp from accumulating under the bag. The pad should be either the self-
inflating type (expensive) or made of a closed-cell foam. Both are lightweight 
and both make sleeping much softer and warmer. The final item to consider is 
either a ten or a bivouac sack (bivy sack). I'll discuss tents in a later issue. 
Bivy sacks are sacks into which you place your sleeping bag. The bivy should 
have Gore-Tex on the top to allow it to breathe and yet still be waterproof. The 
bottoms are usually made from a urethane coated nylon packcloth. The bivy will 
ad about 10 degrees to the rating of you sleeping bag. The bivy has the 
advantage of being significantly lighter than a tent. Bivy sacks cost between 
$90 and $150.

Ron Blackwood just passed the Godan test at the 1995 Tai Kai. He has trained for 
10 years under Kevin Millis, 9th Dan. His hobbies include technical rock 
climbing, Scuba Diving (1 more class to qualify as Master Diver) and competitive 
shooting. He's backpacked all over the country including Mt. Whitney. 








