Bose always reminds people of all kinds of noise-canceling headphones and audio black technology, but Bose noise-canceling sleep earplugs II is different from ordinary headphones. Not only can it not play music, nor does it add active noise reduction technology, but through playback white noise of simulating environmental sounds such as rain and ocean waves to cover the noise.
In addition to the rain sound mentioned above, the Bose Sleep App also provides a variety of white noise effects to choose from, including the rustle of leaves being blown by the wind, the continuous sound of waterfalls pouring, the sound of waves, and so on.
The wearing experience of this product is a highlight. Most passive sound insulation earplugs are protruding on the outside, which will affect the side-lying after wearing. However, this product is unique in design. Unlike the familiar true wireless earphones, its cavity volume is quite flat and small. After wearing it, it will fall into the concha cavity completely. Even if you lie on your side, it will not produce a sense of pressure and will not cause any discomfort.
It can truly improve your sleep quality!
Alex Lux 
Jason 