Scruples makes great hair products and I especially like their products that are made to protect your hair from heat damage. I blow dry and flat iron my hair all the time so I need all the protection I can get. This is not only a thermal spray, it is a styling and finishing spray as well. This means that it helps your hair to stay straighter and it also helps to lock in moisture so your hair looks healthy and it keeps out the humidity which means no frizz! You can use this spray when your hair is wet or dry it really does not matter because it works equally as well. $13 may seem like a lot of money for something like a thermal spray but in reality it isn't. It comes in a 250mL bottle which lasts a very long time! It is also of excellent quality so it is well worth the money I paid for it. I can honestly say that it is the best thermal spray I have ever used in my entire time of using thermal sprays. My hair has been more protected than ever and I definitely recommend that everyone at least tries this product!