Constructed of 100% polycarbonate, a lightweight and impact-resistant material that will give years of use Dual Density, double-spinner wheels assure a stable base with multi-directional rolling with zero weight on your hand for easy travel; 3-dial TSA approved combination lock for security Expandable roomy interior offers two packing compartments with elastic straps and mesh divider; lining can be removed and machine washed Feaures Delsey’s patented Overweight Indicator (on 24/28" models) lets you know if your luggage weighs more than 48.5 lbs to avoid charges at check-in (no battery required) Side, top and bottom carrying handles for easy lifting; backed by a manufacturer’s 5-year limited warranty; 20 Inch exterior dimensions are 22.75 x 15 x 10 Inches, 28 Inch exterior dimensions are 31.5 x 19.75 x 13 Inches, (All includes handles & wheels)