Easy enough to find: HPP Webshop
Essentially it’s a guy telling two stories, one in each ear. In trying to keep track of them, your conscious mind will get confused and drift off into a trance-state similar to hypnosis. The track is filled with “hidden” instructions. So one story will say the word “be”, followed by the second story saying “confident”. Your subconscious hears “be confident”.
I find them entertaining to listen to (the stories are cute), and I do end up in a relaxed state.