Keratin Smoothing companies are seldom upfront with the actual ingredients in their products. They have incomplete and vague MSDS. I believe it is very important to keep the air in the salon free from these vapors. The only way to do this is at the source. Aerovex Systems’ Chemical Source Capture System has proved to be a very reliable and dependable way for me to provide myself and my clients with a safe salon environment. It is very easy to clean and maintain. I highly recommend this system. I am the proud owner of the first source capture system. This unit has lasted for several years and is still going strong.