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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:

A wool fabric made in France from the wool of Pyrenees’ flocks of sheep. The Pyrenees are a mountain chain between France and Spain. The fabric is well known because it is a high quality fabric which...
Wet describing chemicals applied to a fabric and generally seen as less environmental-friendly than mechanical dry finishes. However, there are some eco-friendly wet finishes, which are increasing in...
A woven fabric, usually cotton or maybe linen, with loop pile on one or both sides. Pile, also jacquard and dobby combined with pile. It has either all over loops on both sides of the fabric or...
Basting is the process of temporarily sewing or pinning fabric together. This can be done by hand or by machine. Quilters use basting to temporarily position applique pieces. They also baste the top,...
A technique of altering yarns to make them fluff, curl, or crimp up to give them a bulked appearance. High bulk yarns are sometimes made by combining high shrinkage staple components with low...

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