What price range are you looking at? One person's mid-tier is not another's.
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What do you consider to be "mid tier"? I have some $70 Raycon earbuds that sound awesome. I've had them for a few years, so the newer ones are probably even better
Jabra Elite 75t. Perfect earbud IMO. They're the ONLY ones that fit snug in my ear for running. Great bass, good battery life. They're also low profile enough to fit comfortably under a motorcycle helmet.
Edit: After seeing other responses, not sure what mid-tier means, but these are well below the $700-$1000+ premium earbuds. About $180 new and around $60-$100 refurbished.