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What is "Warmth to Weight Ratio" - Definition & Explanation

A measurement used to evaluate the effectiveness of an insulated product in relation to weather conditions and the environment. The insulation with the best rating is down. Down provides the best warmth to weight ratio over almost any other insulation material, which is why you will see down garments and sleeping bags as the primary choice for use in almost every high altitude, cold weather expedition.

Some other terms

Some more terms:

In this type of quilting, shapes are cut and sewn together to form a design. There is no background piece and the seams are hidden on the back side of the quilt top. Pieces may be geometric or may be...
Silk, the fabric that makes its own statement. Say "silk" to someone and what do they visualize? No other fabric generates quite the same reaction. For centuries silk has had a reputation as a...
A number, derived from the number of warp (or weft) threads per unit length and the linear density of the yarns, that indicates the extent to which the area of a woven fabric is covered by the warp...
Usually a plain weave, mercerized fabric made of long staple cotton which when treated with dope is used as airplane fabric to cover wings, fuselage or tails. Also used for boys’ suits, shirtings,...
Fustian is a term for a variety of heavy twilled woven cotton fabrics, chiefly prepared for menswear. Usually dyed in a dark shade. Declined in popularity from 1813, being replaced by harder wearing...

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