Locking push button handle system with aluminum channels for added strength. Deluxe 8-wheel multi-directional 360 degree spin technology. TSA approved locks. flush mounted for strength. Side feet and corner guards for extra protection. Interior has zippered dividers and tie down straps. Expands 2" for additional packing capacity. Full iconic London Fog plaid lining interior as well as custom London Fog hardware. Limited lifetime warranty.