Our Athena Luggage Collection by Heys USA consists of impact resistant Polypropylene that can withstand up to 400 pounds of pressure. This Wheeled Luggage Collection includes a 21", 28", and 32" hardcase pieces. Each suitcase is designed to be ultra lightweight for easy maneuvering with 4.25" diameter inline skate wheels and metallic ball bearings for smooth rolling. These durable suitcases have a fully lined interior with two built in 3-digit TSA approved locks for added security.