Over the past decade, I've owned a succession of Etymotic earbuds. They got started on the research side of the house (i.e., trying to measure things inside the ear) and they still do a serious business in professional earbuds for stage musicians.

For mowing lawns, that's overkill, of course. My primary use is when sitting on airplanes, so comfort matters just as much as sound quality. My current pair, the "hf2" also has a convenient microphone that works with my laptop and smartphone. Etymotic offers products at a variety of price points, and with many different sizes and styles of things that squish into your ears. I switched out the default ones for the black foam eartips.

Highly recommended.