I've used two primarily: Alpine MusicSafe Pro Etymotic Research ER20 I'd say both are comparable. Though the Alpines come with three filters allowing you to

I've used two primarily: Alpine MusicSafe Pro Etymotic Research ER20 I'd say both are comparable. Though the Alpines come with three filters allowing you to select the level of attenuation. The Etymotics are bit longer so stick out your ear a bit funny looking, but they're more cone shaped and are easier to put into your ear. The Alpines come with a little tool that helps inserting it into your ear. To be honest they're both quite cheap so try both and not break the bank. If you want to go higher end you can get ones where you can get a custom mold to your ear canal. But I don't have a recommendation there.