Personally, I would say that plastic bags
samsonite luggage review [coolbagsclub.com] have the following advantages:
it is easy to remove dust and almost all types of mud;
effectively protect fragile objects from damage;
allow you to transport properly packaged clothes without wrinkling;
protect contents from getting wet during heavy rain.
But there are also disadvantages to them: during rough handling, scratches appear on the surface; upon impact, they may crack and even break the bag; bags made of some types of plastic are quite heavy.