Most cushions start strong. You sit down, it feels fine, and for a little while you think you've finally found the answer. But foam breaks down with your body heat. Gel warms up and loses its support. By the halfway point of your trip, you're right back to shifting around and counting the minutes until you can stand up.
Air cells don't break down the same way. The air inside the Sondur's 24 chambers doesn't soften with heat or flatten under pressure. So the relief you feel in minute one is the same relief you feel eight, twelve, even seventeen hours later. And because the cushion is fully adjustable, you can add or release air at any point during your flight to dial in exactly the firmness you need as your body settles in.
This is the first cushion that doesn't give up on you halfway through the day.