I recently bought Fixdeep hair thickener from Amazon, as a dermmatch user it is difficult to find the color I want in the market now. However, fixdeep is the same style and it's a very successful product, I liked it very much, as someone who sweats, it does not flow. Has anyone used this fixdeep hair fibers product for a long time? I would like to see the comments of someone who has used the product for a long time.