How to use and achieve a 100% lights blocks?
Step1: Put the eye mask on your forehead and then adjust the strap to the most comfortable position to fit your head well.
Step2: Pull the eye mask to the eye area and adjust the eye module until fit it perfectly with your bridge of nose and eyes well.
Step3: Pull down the nose flap and adjust the position then adjust strap until the eye mask fits snugly on your face.