1.[Space-Saving Foldable Design]The Expandable Bag is designed for ultimate convenience. Its compact, foldable design makes it the perfect 'just in case' bag for your travels. Once you're done using it, simply fold it flat for easy storage, ing up valuable space in your closet or suitcase. 2.[Removable Wheels for Versatility]Transform your bag with ease! The removable wheels can be installed or detached in under 30 seconds, allowing you to switch from a duffle bag to a rolling suitcase in no time. Say goodbye to trolley fees and carry your bag in comfort. 3.[Generous 40L Capacity]With a spacious 40-liter packing capacity, this bag provides ample space for all your essentials, from weekend getaways to longer trips. You'll have plenty of room to pack everything you need—and maybe even a few extras. 4.[Expandable Bottom for Extra Storage]Need more room? Simply unzip the bottom of the bag to expand its capacity by 25%, giving you the perfect space for souvenirs, extra clothes, or those unexpected finds on your travels. It's the ultimate solution for packing flexibility.