34 Pa. Code § 47.24 – Mixtures.

(a) Mixtures of filling material shall show the exact percentage by weight of each labeled ingredient of the mixture. The following shall serve as an example of the possible combinations of mixture and method of labeling for different materials:
1. (1) All new materials— 20% goose down 60% goose feathers 20% chicken feathers.
2. (2) 50% new curled horse tail hair 50% new curled hog hair.
3. (3) 80% new kapok 20% new cotton linters.
4. (4) All secondhand materials— 20% cotton linter felt 80% cotton linters.
(b) Feather or down mixtures shall be designated by the name, character, and percentage by weight of each material used or the entire mixture shall be designated by the name of the lowest grade of material used. A tolerance of 10% shall be allowed.
(c) Each article in which feathers or down are used, whether new or secondhand, shall be labeled to show both that the feathers or down have been sterilized and disinfected and the permit number of the person or firm doing the sterilization.