It is a mixture of botanicals and herbs, and is sold as incense. It does get you high like weed, but on the package it clearly says "not for human consumption." I have taken the risk, and after about half a bowl, I was higher than a kite. When I "came down" (which I have never had a come down from real weed) I got a massive headache, and had a sensation of fullness in my ears. My husband on the other hand, had no adverse side effects, and continues to buy and smoke this product. If you do not have side effects such as mine, this price is actually well worth it. like I said, it took one or two hits for me to feel good. You do not need more than one bowl, and it lasts for a long time. I have heard rumors of the Military starting to test for it, but legally they can't do anything, because the product is legal, it is just not "recommended for human consumption."
Here is a site that I found very useful:
http://www.k2-incense.com/what-is/
Best of luck!