Referring to “vous adorerez cette autre idée : modifier un pyjama en flannelle défraîchi.”
for
“you will love this other idea: making alterations to a pair of faded flannel pyjamas.”
I can only find “flanelle” (one “n”, not two) in the dictionaries. And this is a female noun. So should these answers all be “…en flanelle défraîchie.”?