0 a long, flat bag that is carried folded in half, in which a suit or other item of clothing can be kept while travelling -- 放置西服的袋子
There is a type of "garment bag", with two handles, that can be folded by the middle for easy carrying it with one hand.
Garment bags protect clothing from dust, dirt and smells.
Some models of "garment bags" may have a strap for holding them on the shoulder and quite often, some type of handle.