This one loads by default, and there's a reason for that. Brown noise with a little wind layered in, nothing pulling focus in any one direction. The gust speed is kept slow and the bell chance low, so most of what you hear is just the drone and noise doing their job quietly underneath.
If you don't know which sleep preset to try first, start here before the more specific ones like Cavern or Distant Thunder. It's the most neutral sleep music on the site, not trying to be rain, not trying to be ocean, just steady brown noise built to run for hours without repeating, which is the actual baseline the rest of the Sleep set branches out from.
It's generated live on your device, offline included, so it keeps running the same way whether you're on wifi, on a flight, or somewhere with no signal at all.
StillTune composes endless, ever-changing music for sleep, focus and relaxation. Real melody and instruments, generated live, with no audio files. Explore more sounds.