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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:

Spread Tow Fabrics is a type of lightweight fabric. Its production involves the steps of spreading a tow of higher count, e.g. 12k, into thin-and-wide spread tow tape (STT) and weaving them into a...
A method of compressing, shrinking and felting a fabric through the use of moisture heat and mechanical pressure. Usually done on wool and wool blends such as melton. The process often obscure the...
A sock is a baglike covering for the foot and/or lower leg, which is designed to ease chafing between the foot to keep the feet warm and absorb sweat from the feet. Sock lengths vary, from covering...
A shirt is a sort of top, i.e. a piece of clothing for the trunk of the body. In the UK, it refers almost exclusively to what Americans call a dress shirt, i.e. a garment with a collar and a full...
A true crewel fabric is embroidered with crewel yarn (a loosely twisted, two-ply wool) on a plain weave fabric. Traditional crewel fabrics are hand-woven and embroidered in India. The design motif...

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