Free Your Hands: This carry-on luggage features a built-in seat and harness, serving as both a rest area and extra storage. The seat back folds down, and a hook holds additional luggage, freeing up your hands during travel.Durable Material: Made with thickened PC and an aluminum alloy frame, this hard-shell luggage is tough and long-lasting. The special push-lock closure avoids zipper issues.360° Mute Wheels: Four 360° silent spinner wheels ensure smooth, quiet movement. Braking devices keep it stable, and the widened bottom prevents tipping over.Retractable Handle & TSA Lock: Ergonomics telescopic handle with multi-steps adjustment. The side TSA lock allows the agent to check luggage without damaging it during travel.Organized Interior: With a 40 L capacity, multiple compartments, and waterproof bag, this carry-on luggage fits most airline luggage racks with mesh fabric.ABS