I am very impressed with these eye masks. I have used many creams and serums due to being a mom and being absolutely tired all the time. Dark circles and puffy eyes are a common thing to experience all day for me. While most creams and serums help, this mask was the best I have used so far. I cannot use it overnight, but I try to keep it on while working on my computer for a few hours. I can really tell a difference before and after.