I've been running for most of the year, and running with wired earbuds is a pain in the rear. I finally decided I'd had enough and needed some wireless earbuds. I wanted decent quality, but inexpensive. I did a lot of surfing on the 'Net to try to filter out the crap and narrow it down to inexpensive quality units. For me, inexpensive meant <$50. There are a bunch of unknown Chinese brands, so I ruled those out right away. I didn't want a lithium battery exploding in my ear after all.
I narrowed it down to 3 brands, Anker (great cust svc and they make great cables), Phaiser and Senso, because they all got almost universally good reviews.
I didn't want the around the ear style clips and I wanted something that fit into my ear canal vs the type that comes with an iphone, so I decided against the Sensos. Then it was a toss-up between the Phaiser and the Anker. I know Anker has great customer service, and I figure I couldn't have gone wrong with either, but I think the Phaiser marketing got to me.
I ordered these for $36 from Amazon.
Phaiser BHS-750 Bluetooth Headphones

They are bigger than I expected and since they are made of metal, they aren't particularly light, but they are completely comfortable in my ears and they aren't going to fall out unless I take up boxing while wearing them. The battery is supposed to last 8 hours. They have 3 built in sound profiles. They come with multiple sizes of stuff to fit them to your ear comfortably and have a 2 year warranty. Like a lot of this type, they have little magnets so if you pop them out, you can wear them like a necklace until you put them back in or put them up. I think they sound surprisingly good for an ear bud.
I considered the Phaiser BHS-730 which has lots of great reviews, and the BHS-750 and 760 which also have great reviews and even the BHS 780 and 790 which bumped the price up to $50. In the end, I went with the 750 because it's supposed to be a newer upgraded model from the 730, and I couldn't see a reason to spend the extra $14 for the 790 for running when I've got a
great set of over the ear headphones for when I'm not running.
I'd considered the
Anker Spirit headphones at $39 and the
Anker Spirit Pros at $49.