Soundcore Sleep A20

Designed specifically for side-sleepers, the Soundcore Sleep A20 earbuds are ultra-slim and comfortable. They don't feature active noise cancellation in the traditional sense, but they use passive noise isolation to block out snoring or city traffic. They include a built-in sound machine feature that plays soothing audio directly into the ear. While they are not as effective as over-ear ANC headphones for travel, they are significantly more comfortable for sleeping.

They are a niche product that excels at its specific goal of providing a quiet sleep environment.