according to wikipedia:
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is a measure of thermal resistance
, commonly used in the textile industry
, and often seen quoted on, for example, duvets
The Shirley Institute
in Britain developed the tog as an easy-to-follow alternative to the SI
unit of m2K/W. Launched in the 1960s, the Shirley Togmeter is the standard apparatus for rating thermal resistance of textiles, commonly known as the Tog Test.
A tog is 0.1 m2K/W. In other words, the thermal resistance in togs is equal to ten times the temperature difference (in °C
) between the two surfaces of a material, when the flow of heat is equal to one watt
per square metre.
According to British retailer John Lewis
, tog guidelines for duvets are as follows:
Lightweight summer duvet:4.5 togSpring/Autumn weight duvet:9.0 - 10.5 togWinter weight duvet:12.0 - 13.5 togAnother unit of thermal resistance of textiles is the clo
, equal to 1.55 togs (1 tog = 0.645 clo).
Thinsulate provides warmth without bulk and offers equal thermal resistance to conventional fillings for about half the thickness. The fabric
does not "mat" down. It retains its insulation qualities when damp. Thinsulate is odourless, non-allergic and can be hand or machine washed. It washes well and dries quickly. The TOG rating for this fabric
But what that translates to in Rvalue, Im not sure. Thinsulate is used for sleeping bags and cold weather clothing
to simulate the warmth of down, but retaining the ability to insulate when wet. Not sure how that would work insulating a refrig or freezer
. I would go with foam, due to structeral stiffness and I think, better insulating properties.