I upgraded to a hard folding model and the difference was night and day. I went with a mid-level cover I found on their website, and it’s been whisper-quiet even at 75+ mph. The seals and design really cut down on wind resistance and there’s no flapping, rattling, or whistle. It also didn’t hurt my gas mileage as much as I expected, which was a bonus. The panels sit flush and the materials hold up well—no vibration, even in crosswinds. You can browse the different models at https://bak-flip.com/ The site has noise and airflow ratings that helped me pick one that wouldn’t annoy me on longer trips. Totally worth checking out if highway comfort matters to you.