A mystery wrapped in Japanese that has made my baths infinitely more enjoyable. Ok, maybe not infinitely, but i have thoroughly enjoyed these. I use two packs in a larger than average but not huge tub. I have a diminished sense of smell but can smell these! I never know what to expect for each packet but they are generally nice. I take soaking baths that last hours regularly, I'm kind of an expert. I get up early to take two hour baths, that's how important baths are in my life. And these are definitely professional quality bath salts.