Reusable (and washable) quality earplugs, those that are a bit cone shaped so that they don't get stuck in your ear. The kind you use at a shooting range. I wo

Reusable (and washable) quality earplugs, those that are a bit cone shaped so that they don't get stuck in your ear. The kind you use at a shooting range. I would warn not to use them all the time. Let those ears breath. I only use them when I need to focus very hard or when it's very noisy.