High-quality polycarbonate shell for durability and protection, 2-inch expandable feature allows for additional packing capacity, Eight (8) spinner wheels system for smooth mobility, Push-button retractable handle system for easy maneuverability, Built-in 3-digit TSA-approved lock for added security, Top and side carry handles for versatile carrying options The fully lined interior features a zipper divider for organized packing, Two mesh zipper accessory pockets and a small accessory pocket for convenient storage, and Tie-down webbing straps to secure belongings during travel Carry-On Dimensions: Interior: 20" H x 13.5" L x 8.5" W || Exterior (Including Wheels): 22" H x 14" L x 9" W - 6.7 lb 24" Upright Dimensions: Interior: 24" H x 16" L x 11" W || Exterior (Including Wheels): 26" H x 16.5" L x 11.5" W - 8.3 lb 28" Upright Dimensions: Interior: 28" H x 18.5" L x 12.5" W || Exterior (Including Wheels): 30" H x 19" L x 12.75" W - 10.5 lb