FACE MASKS "Effective or Not?"

So my Boss just gave me these mask sheets and I also want to try if these are really effective ,
First you have to wash your face with clean water and then apply the mask , the mask is really really wet with its juice inside but the good thing is it smell like what is in its cover so it smell like grape , it will just took up 15mins in your face and after that youll going to get up you will be refreshen up and its really nice it really moisturizes your face.