I use Loop Ear Plugs for higher-speed top down driving in my convertibles. My son originally bought these for use at concerts, then tried them at an F1 race and loved using them. At Christmas 2024 he gave them to my wife and I, and we use them driving and at an F1 race as well. They are extremely comfortable, very discreet and enable having a conversation while still mitigating road noise. They come in a tiny plastic pouch so easily fit in the glove box on my Plus Four. Here's the link to their website: www.loopearplugs.com
They ship globally and the site will ask you to select your location.
Here's a photo to show the size and scale
[Linked Image]