123 E. Simplot Blvd  *  Caldwell, Idaho 83605  *   FAX:  (800) 333-6930 or (208) 402-0112

PHONE:  (208) 402-0110 or  For Orders Only: (800) OWF-SHOP (693-7467) 

Orders: order@owfinc.com  For Questions: owfinc@owfinc.com

Monday-Thursday 8-5 MST Friday 8-4 MST closed Saturdays,  Sunday closed except by special appointment.

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)
ETR = Effective Temperature rating
T = the quilt or bag's thickness, in inches, covering the person.  

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

Also helpful are a couple of the manufacturer links:

Here is the link for Primaloft: http://www.albint.com/primaloft/

Here is the link for Thinsulate from 3M: http://cms.3m.com/cms/US/en/2-147/crzuiFX/view.jhtml

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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