Although these are very lightweight, they stood up well to being (over)packed. The mesh front allows air to escape. I can't believe how much more I could pack when using these vs just packing in a suitcase. Since the items were not shifting around as the suitcase got tossed around during transit, the clothes were less rumpled when we unpacked. Additionally, they act as dividers for organizing your items in the drawers/on the shelves when you get to your room.