- UPGRADED DUFFLE BAG WITH WHEELS: Constructed from durable, scratch-resistant, and waterproof Oxford cloth, this carry-on suitcase is designed for resilience. The sturdy metal zipper and PC hard shell base add to its durability, ensuring your belongings are protected during travel. Equipped with 360° silent, solid non-detachable wheels, this bag offers smooth and flexible movement in any direction, eliminating concerns about wheel detachment. - VERSATILE USAGE MODES: This innovative luggage adapts to your travel needs with three modes. It starts as a compact 35L duffel bag, expands to a spacious 50L carry-on, and can further extend to a generous 65L for longer trips. When not in use, it conveniently folds for easy storage under a seat or bed, providing flexibility for every journey. - MULTI-POCKET ORGANIZATION: Stay organized with a well-designed interior featuring a main compartment and two internal slot pockets for larger items. Two additional slot pockets keep your essentials like passports, phones, and keys easily accessible. A back zipper pocket is perfect for phones and cards, while three external front pockets can hold items like water bottles, iPads, or umbrellas. - MULTI-PURPOSE FUNCTIONALITY: Ideal for a variety of activities, this travel bag is perfect for short trips of 3-7 days, accommodating clothes, electronics, shoes, and toiletries. Its size and features make it suitable for sports activities, weekend getaways, shopping excursions, hiking, and camping. Use it as an overnight bag, gym bag, hospital bag, or expandable luggage for business trips. - PRACTICAL USE SCENARIOS: Whether you're heading to the gym, embarking on a weekend escape, or preparing for a business trip, this duffel bag meets your needs. Its expandable design allows you to carry everything you require, while the durable materials ensure it withstands the rigors of travel. Enjoy the convenience of a well-organized bag that adapts to your lifestyle.