How about a water proof rating?? AirPods are known to fail with a lot of sweat. I don't dare run or indoor bike with mine since I'm a heavy sweater.
oops.. missed the footnote
AirPods Pro are sweat- and water- resistant for non-water sports and exercise and have a rating of IPX4 under IEC standard 60529.
My Air Pods went through a washing and drying cycle two years ago. All three pieces fell down when I opened the door of the dryer. Amazingly, they still work.