"Winter Clothes"

Translation: Dillad Gaeaf

[MarkJones10]

I understand dillad is the correct word, but you don't hear school uniform called dillad ysgol", Could an accepted answer to this also be "gwisg"?

[NicDafis]

To me, "gwisg ysgol" sounds like "school costume" - something you might wear to a fancy dress party, parti gwisg ffansi.