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Effective Temperature Rating
There
is a Rating formula from "Beyond Backpacking" by Ray Jardine that is
helpful in determining how many layers of insulation you need. ETR=100-(40xT) When we multiply the thickness wanted by 40, then subtract the result from 100, we arrive at the ETR, the quilt or bag's Effective Temperature rating, in degrees Fahrenheit." Ray Jardine
For
example: If you want a 20 degree bag it would require ~2 inches of loft Also helpful are a couple of the manufacturer links: Here is the link for Thinsulate from 3M: http://cms.3m.com/cms/US/en/2-147/crzuiFX/view.jhtml
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Styles, Colors, Availability and Prices are subject to change without notice. All prices may vary slightly due to the rounding differential in the computer.
♥: Indicates items available only while the supply lasts. This item will not be replaced.
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2006 OUTDOOR WILDERNESS FABRICS,
INC. All rights reserved. Please come see us if you are in our area. |