Rug Weights

I thought Denier was to do with the weave of the fabric the denser the better as in 1600 for a really waterproof winter rug and 600 for a light summer turnout sheet. With grms being the weight of the filling
 
Denier is the strength of the outer fabric of the rug - ie a 1200D is stronger than less likely to rip than a 600D rug.

The fill is what you need to ascertain the warmth/weight of the rub and this is what is measured in grams.
 
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