What Our Gearhead(R) Experts Are Saying:"I travel enough that the weight of a carry-on actually matters to me, and the Ozone Carry On Hardside 4W Bag coming in at 6. 5 pounds is one of the lightest hardside options I have used without feeling like it would crack under pressure. The Hinomoto Silent Run wheels are noticeably smoother and quieter than anything I have rolled through an airport terminal before."The gate is across the terminal, and the connection is tight, and this is exactly the moment the Osprey Ozone Carry On Hardside 4W Bag was built for. At just 6. 5 pounds, it is one of the lightest hardside carry-ons in its class, wrapping your gear in a 70% recycled Makrolon polycarbonate shell that is durable enough to handle overhead bin compression and checked baggage handling without adding unnecessary weight to the journey. The ZeroLiner unlined interior maximizes packing space, reduces waste, and makes cleanup between trips straightforward. Four 60mm Hinomoto Silent Run spinner wheels glide quietly across every surface from polished airport floors to cobblestone hotel approaches, and a custom overmolded trolley handle keeps the roll smooth and controlled at any pace. Interior fabric dividers organize the main compartment without the bulk of a traditional liner, and the TSA-approved Travel Sentry lock with YKK EYL zippers keeps everything secure through every leg of the journey. Part of Osprey's coordinated Ozone travel system, the Ozone Carry On Hardside 4W Bag pairs seamlessly with other pieces in the family for a complete, considered travel kit built from responsibly sourced recycled materials throughout.