Chapter 7 Flashcards
What natural material maintains its insulators properties when wet?
Wool
Is cotton always inappropriate for SAR? If not, what environment is it best for?
No
Warm or moderate
What 3 things does the heat rate transfer in clothing depend on?
1: amount of dead air trapped between clothing and it’s layers
2: water and moisture in layers
3: the amount of air that passes through the material
What are the 5 layers of clothing in order?
Underwear, wicking, clothing, insulation, shell
A waterproof, non-breathable shell layer is called a?
Vapor barrier
The clothing layer should do what?
Saturate and encourage evaporation
When dry, what 4 materials have similar insulation for the same thickness?
Nylon fleece, polyester like and batting, goose down, wool
Cordura is a type of:
Nylon
Which materials fibers are hollow, don’t absorb moisture, and are poor at wicking moisture?
Polyester
What are the 4 natural fiber materials?
Cotton, down, silk, wool
What material is noted for having the greatest amount of dead space, and is considered the best insulator when dry?
Down
What are the three synthetic materials?
Nylon, polypropylene, polyester
When your feet are cold you should always:
Put on a hat
Which shell layer is fully water/wind proof, but isn’t very breathable? And what is it usually made of?
Waterproof
Nylon
What shell material sheds water that’s not under pressure, and is used to allow perspiration to come through, while providing a windbreak?
Water-repellant
