Material: These luggage sets with wheels are made from high tenacity PC material, harder and more resistant to pressure, effectively reducing damage caused by collisions during travel. Protection: Each suitcase is covered with a protective film, which can be removed before use to avoid bumps and scratches during transportation. Safe:Side mounted TSA lock which allows only TSA agents to inspect your suitcase sets without damaging the lock. Zippers are not easy to be pierced by sharp tools, that protects your stuffs in luggage and privacy more better. Carry & Move:Silicone handles make it easier to lift your suitcases when going up and down stairs. Sturdy 3-step telescoping handle slso allow you to maneuver in tight spaces and provide effortless movement. Expandable 3 Piece Set: The 24-inch and 28-inch suitcases are expandable, providing 25% additional space for your belongings. The travel luggage has a fully lined interior with mesh pockets and elastic tie-down straps to secure things in place. The Merax Luggage Sets Made of lightweight and durable PC material upgraded with strong resistance to stress, high and low temperatures and impact. Built-in reinforced corner guards provide extra protection and minimize damage. Large storage space and fully lined interior with zippered compartment to keep your items organized. Low profile top and side handle provide for ease in handling.