Easy to carry. reasonable size16 inches can be conveniently placed on top of 20 inches of luggage. and can be freely combinedExtended storage space1. Adding more packing capacity Expandable zipperStrong and durable zipper protects your clothing2. Two quick-access pocketsEasy and fast access to your belongingsInner storage space.Spacious and organized inner storage space.Pull RodAdjustable pull rode meets different height requirements.360° Double Spinner WheelsUniversal rotation wear-resistant and silent aircraft wheel. suitable for a variety of ground.