Not all down jackets are the same: There are three fundamental features for assessing the quality of a down jacket: source, species and composition. You can notice that with the majority of down jackets that are on sale, at least one of the above features is omitted.
The thermal insulation indicator on garments enables defining the comfort level at various temperatures, and is printed on the 100% feather label in down jackets. This indicator is the result of combining the right type of fabric, the manufacturing method and the amount of down, and varies according to the model. The result is purely indicative as the variables are also subjective. The thermal insulation category for each garment is given according to the coding A, B, C, D, E and shown at the top of the label, and is not related to the value of the garment according to other parameters.