APC* shell material for maximum strength in quality, weight, performance and fatigue resistance. Maintain a high level of visual interests with a wavy design while maximizing every inch of the case for extreme packing capacity. Industrial graded metal handle system tubes with ergonomic carry grip for enriched confidence and user experience. Highly scuff-resistant twill pattern texture. Industry leading expanded capacity in all sizes. Coarse density expansion fabric for extra strength. TSA-approved keyless combination lock on medium and large spinners. Confident assurance for protecting belongings while luggage is checked-in. Premium dual spinner wheels for stable balance. Industry graded nylon tires for smooth mobility. Custom design lining pattern for enhanced visual impact.