Silverskates wrote:
…I'm also careful about where I use them since I'm not 100% confident they'll stay in. I wish Apple would adjust their tip sizing because I, like you, got the pro model so they'd stay in! Suggest you report this prob to tech support, get it on the record (w/your airpod's serial #)…
Your experience is not unique. Mine stay seated, if I stay seated. If walking or exercising, they’ll fall out. Sometimes—too often—they’ll depart, while seated. This across multiple generations. (And all purchased directly from Apple, any suggestions of counterfeit products in another reply aside.)
Inverting and reversing has helped at times, somewhat.
Folks reading here with AirPods or AirPods Pro that fall out? Send your feedback to Apple: Product Feedback - Apple
For folks reading here considering buying, buy directly from Apple and try then and—if they fall out—return them while still within the fourteen day refund window. A number of folks I know have no issues, and the AirPods stay in place during exercise. As mentioned up-thread, I’ve had better success with Beats Fit Pro and their antlers for my ear canals, discussions of lower fit and finish aside.