1. Expandable Double-Layer Duffel Bag: There are two ways to use this expandable foldable travel bag. The first is to use the 28-liter bag as a shoulder bag or handbag for daily use. The second is to install wheels on the four grooves on the bottom of the bag and open the first zipper to transform it from an everyday 28-liter backpack to a large-capacity 43-liter carry-on duffel bag. The second zipper unfolds to transform it into a 58-liter suitcase, which can be used to carry more luggage on long trips. 2. Wear-Resistant Bag: The foldable travel bag with wheels is made of wear-resistant, scratch-resistant, and waterproof Oxford cloth. The hidden buckle design on the side is convenient for securing the work bag. 3. Internal Organizer: This bag has 1 main compartment, 1 internal zippered wet and dry pocket, and 2 slip pockets. The internal zippered wet and dry pockets can keep wet or dirty items separate from other items. Slot pockets provide designated space for small items, allowing you to easily access your passport, phone, keys or other small items 4. Rolling duffel bag with wheels: This duffel bag with wheels and handles is equipped with four removable wheels at the bottom, which can be easily pulled on rough and uneven floors and can rotate 360° at will. Easy to install, push the wheels directly into the grooves and start your journey