【Complete 6-in-1 Travel Set】 Includes 16-inch (carry-on), 20-inch (small checked), 24-inch (medium), 28-inch (large checked) hardside suitcases, plus an expandable travel duffel bag and a waterproof toiletry bag. Perfect for family trips, long vacations, or business travel - keep everything organized from packing to return. 【Built-in TSA Lock & Secure Design】 Each suitcase features an embedded TSA-approved combination lock, allowing security to inspect your bags without damage. Protects your valuables throughout international and domestic flights. 【Expandable Duffel & Wet/Dry Separation】 The included travel duffel bag expands for extra packing capacity. It has a dedicated waterproof compartment to separate wet items (swimsuits, toiletries) from dry clothes, or store dirty laundry - no more leaks or odors. 【Silent 360° Spinner Wheels & Adjustable Handle】 Ultra-smooth double spinner wheels rotate 360° for effortless maneuverability in any direction. The lightweight, corrosion-resistant telescopic handle adjusts to 2 heights, fitting users of all statures. 【Durable & Scratch-Resistant Shell】 Made from premium ABS material, the hard shell is lightweight yet impact-resistant. The textured finish significantly reduces visible scratches from baggage handling - looks great trip after trip.