excellent protection against the elements, which the EXTREME Pro-Tech Bag or
Vest offers, is due to a combination of design and scientific
thickness and corrugation of the EXTREME Pro-Tech walls create a layer of still
air that provides an excellent insulation medium. The metallized surface of the
material reflects radiated heat back to the body, and minimizes the emission of
radiated heat through the outside of the bag.
elastic strung inner membrane web causes the EXTREME Pro-Tech to hug the body,
increasing its overall insulating ability, and reducing any air convection in
the space between the bag and its occupant.
EXTREME Pro-Tech is completely windproof, this aids in minimizing any body heat
losses due to the effects of wind chill.
EXTREME Pro-Tech Bag or Vest is completely waterproof, and will continue to
function perfectly even if completely wet both on the inside and
adjustable draw-cord arrangement around the opening helps to minimize body heat
loss through the top opening of the bag.
EXTREME Pro-Tech Bag or Vest is surprisingly tough and durable. The principal
construction material (metallized polypropylene) is a strong, lightweight and
extremely wear-resistant plastic polymer.
EXTREME Pro-Tech Bag or Vest has a unique patented design that helps ensure
that the material is virtually always held in a state of compression, so that
tears do not tend to elongate beyond the seams. Any tears that might develop
are usually stopped when they intersect with one of the many welded seams in
the bag's construction.
- Samples of
the material have been tested in laboratory equipment designed to measure the
thermal resistance (insulating ability) of textile materials.
- Table 1
shows the performance of the Pro Tech material compared with that of other
well-known sample products. Performance is measured in "Togs", a unit of
thermal resistance commonly used in the textile industry.
- 1 Tog
= 0.1 m2K/W (i.e. one Tog is a tenth of a square meter degree Celsius per
performance of samples in laboratory tests
|Polyethylene survival bag
|The Original Space Brand Emergency
|Heavy full size Down Mummy style 6 season
sleeping bag (w/outside coated shell)
results in Table 1 show that the EXTREME Pro-Tech Bag offers a very high ratio
degree of warmth for its weight. This is enough to make a very significant
difference to a person's chances of survival in an emergency situation, and
easily adequate for lightweight back packing and similar use.
products were tested under laboratory conditions using a man shaped dummy
filled with hot water. By measuring the rate at which the dummy cooled it was
possible to derive and calculate the thermal efficiency of the sample different
process was repeated on a number of different Pro-Tech bags with varying
degrees of previous field and lab use.
performance of laboratory tests
||Warmth to weight
|Polythene "survival" bag
|Space® Brand Emergency
|3 season synthetic bag
|6 season down bag
¹The thermal efficiency was measured with the bag resting
on an insulating mat.
important points can be deduced from the test results shown in Table
EXTREME Pro-Tech Bag has shown itself to be equivalent in providing the same
degree of body warmth as a three-season sleeping bag.
performances of the EXTREME Pro-Tech Bag or Vest are not affected by previous
or multiple use. Bags and Vests were opened and used repeatedly before testing
to insure re-use potential.
- Based on
the time proven and life-saving thermal reflective principles of the
SPACE Brand EMERGENCY BLANKET, the additional insulation medium (trapped
air) helps to greatly enhance the overall personal insulation and protection
performance of the EXTREME Pro-Tech products.
- The warmth
to weight ratio of the EXTREME Pro-Tech Bag is three times that of a quality
heavy 6 seasons down sleeping bag.
warmth to weight ratio is many times that of a wool blanket, a fact with
significant outdoor safety implications, because a wool blanket will attract
and hold moisture making it less effective, damp and cold.
Let's get technical |
Survival basics |
5 basic survival skills |
Facts on Fire |
Kids Survival Kit |
Your First Aid Kit | First Aid Primer
Facts | Your Personal Survival Kit |
Collection of Outdoor Knowledge |
Other Sites of Possible Interest |
mirrors | Pre-trip
planning | Outdoor
Signaling | A balloon does
what?| Look Before
You Go | Fun Flashlight
| "Off Season" Projects
Products - Space® All Weather
blanket | Space® Emergency
Blanket | Space® Emergency
Bag | Emergency
Signal Day/Night Signal Mirror | You CAN Survive | Esbit® Solid Fuel | Where to find MPI
Lighting Products -
Easy Focusing Headlamp | Safety Flasher
Mini-Giant Focusing Lamp | Northwoods Lights |
Seabrook Waterproof Lights