420 denier polyester interior lining #10 large dynamic embowed zippers, zipped with extra large teeth so that it can withstand extreme forces beyond normal wear and tear 2 rubberized back protectors Unique curved-push button bLACK handle system for easy maneuvering Combination locks for added security Smooth rolling wheel system Inside includes a detachable wet pocket which is great for keeping toiletries and damp items seperated Each upright is expandable up to 25% 18" expandable tote makes a great companion bag to the uprights This set also includes a 19" matching rolling duffle bag which makes this set an exceptional value Rolling duffle includes a zippered back compartment and multiple compartments For organization and storage