This can be stated in active form. Alternate translation: "those who grew up wearing scarlet clothing" or "those who wore scarlet clothing when they were growing up" (See: [[rc://en/ta/man/jit/figs-activepassive]])
Here this phrase is a metonym for luxurious, expensive, and comfortable clothing, at least some of which was probably scarlet. Alternate translation: "luxurious clothing" (See: [[rc://en/ta/man/jit/figs-metonymy]])