PP Hard Shell Luggage: The carry on luggage set is made of 100% PP material to ensure that it will not crack or break during transportation. 2 Piece Suitcase Set: The luggage set includes an expandable carry non suitcase and a travel bag. The perfect combination to meet more of your traveling needs. Expandable Capacity: This 20 inch luggage is equipped with an expandable zipper that can adds up to 20% more space. There is also a waterproof bag inside to effectively separate wet and dry. USB Charging Design：The carry on suitcase come with USB port, which can charge your electronic devices at any time. (Note that mobile power is not included) Secure Protection: Our suitcases are equipped with TSA-approved locks to ensure that only TSA personnel can inspect your luggage without damaging the locks. luggage