- Material and construction: The duffle bag with wheels is made of high quality polyester, wear resistant to abrasion and scratch resistant. It features reinforced handles for easy carrying and pulling, and a metal zipper design that helps the bag open smoothly. - Expandable and foldable capacity: This travel bag is expandable with two zippers at the bottom to adjust capacity. Normal size is 25L, expandable first layer increases to 39L, and second layer increases to a maximum of 53L. You can adjust the storage space as needed. - Detachable swivel caster wheels: The wheeled duffle bag is equipped with 4 detachable 360-degree universal wheels at the bottom for smooth and flexible movement in any direction. Wheels are easy to install and disassemble; just push them into the groove to start your journey. - Versatile organization: The foldable duffle bag has 1 main compartment, 2 interior pockets, 1 inner waterproof pocket, and 1 exterior handy pocket. The dry and wet separation bag helps to keep dry items separate from wet items. - Use scenario: Weekend trips or short getaways are well suited for this bag; expand to accommodate extra outfits or gear. - Use scenario: Business travel or multi-day trips can benefit from organized storage with multiple pockets and the waterproof pocket. - Use scenario: Family vacations or gym trips can use the dry/wet separation bag to keep clothing separate from towels or damp items while moving between destinations.