This luggage is ideal for personal and business travel which is in line with airline standard. It will transport your travel essentials effortlessly and stylishly. 1.Made of lightweight and durable PC+ABS material, with an impact-resistant hard shell, 2.A recessed TSA-approved lock is found on the side of the case that allows only TSA agents to open and inspect your bag without damaging the lock. 3.360 Silent Spinner Wheels provide superior maneuverability, easy and smooth movement in any direction. 4.Handles:Telescopic, 3-step adjustable recessed handle 1 attached cushioned comfort-grip top handle. 5.Side bumper feet：The bumper feet are strategically placed to elevate the luggage slightly above the ground, preventing wear and tear over time. 6.All sizes are Expandable, adding 15% to the scalable space. Measures: Size: 3PCS- 20in 24in 28in Travel days: 20in 1~4days 24in4~7days 28in 7~9days Material: ABS+PC Color:Blue Lock Type: TSA Lock Mechanical Lock Package Includes: 1 x 20" Luggage 1 x 24" Luggage 1 x 28" Luggage