Lojel Superlative Frame Polycarbonate Large Upright Spinner Luggage, Grey, One Size The Superlative Frame is made with pure Bayer Makrolon Polycarbonate reinforced with Lojel patented material to achieve super strength while allowing it to be the lightest hard side luggage in the world. This durable construction is also extremely flexible, giving the outer shell a nearly puncture proof quality. This lightweight spinner features an aircraft grade aluminum frame for those who prefer that extra protection. The Lojel Superlative Frame also offers smooth and effortless movement with its 3-stage trolley and quiet running removable Double Wheels system developed by renowned Japanese Hinomoto. A TSA-certified lock is flush mounted to the travel case which provides security for your belongings throughout the airport handling process. High end interior light weight interior lining is made from best quality polyester, providing a soft protection and is velcroed to the shell to stay optimally organized. Features advance removable divider