Apple posts four ASMR videos. What the heck is ASMR? Read on.

Before you dig into any of the videos Apple just posted, here’s a link to a nice little ASMR explainer.

From the post:

Coined in 2010, ASMR (autonomous sensory meridian response) is a relaxing, often sedative sensation that begins on the scalp and moves down the body. Also known as “brain massage,” it’s triggered by placid sights and sounds such as whispers, accents, and crackles.

With that in mind, fire up some headphones (important!) and watch each of the videos embedded below. Hard to pick a favorite, I’ve enjoyed all four, but don’t miss the Ghost Forest, last but not least.