Read the reviews on the product. If "where" the product is made is not available just go to contact and send them an e-mail asking this very question. They will get back to you with an answer. If they don't then I recommend not doing business with them. If they can't help you with this simple question they probably won't help you with any others.
I believe one of the things that you have to note when shopping online are like what the return policies of the online stores are. This will help you decide whether it is worth the risk. Try and contact them to see whether you will be answered via email or other contact to see if they can be trusted in the first place.