1.Rolling Duffle Bag with Wheels: This duffle bag contains four detachable, easytoinstall silent universal wheels and a suitcase pull sleeve on the back for easy carrying, making you a relaxed traveler. When not in use, simply fold it up into a compact size that can easily fit into your luggage or storage space. No more bulky bags taking up valuable space. 2.Expandable Travel Bag: This foldable and expandable travel duffel bag has two zippers at the bottom that you can open or close to increase or decrease the capacity of the folded travel bag. The first layer is 28L, the second layer is 43L, and the third layer is 58L to meet your needs at different times. 3.Detachable Wheels: The travel duffel bag is equipped with four detachable wheels at the bottom, allowing for easy maneuverability on rough or uneven surfaces. This feature enables smooth multidirectional movement, making it effortless to navigate through crowded airports, train stations, or busy streets by installing or removing the wheels as needed. 4.Dry and Wet Separation: The exterior of the suitcase is made of waterproof, tearresistant, scratchresistant, lightweight and breathable Oxford cloth. Inside a dry and wet separation bag, you can put toiletries and wet towels, keep the bag clean.