The Finvizo sleep eye mask is designed with a deeper 3D eye contour allowing you to move your eyes freely. How to use and realize 100% light block? Step1: Put the eye mask shield on your forehead and then tighten it with an elastic band. Step2: Pull the eye mask to the eye area to fit the nose perfectly. Step3: Press the nose area of the eye mask. Step4: Continue to adjust the elastic band so that the eye mask can fit snugly on your face. How to Clean 3D eye mask ? 1. We recommend to wash it by hands. 2. Please wash after receiving the sleeping mask. As this eye shade for sleep is made of high quality material and wipe gently with water. 3. Let it dry naturally do not wring it out. 4. Do not use a microwave oven or dryer to dry it. Package Includes 1 x Purple Eye Mask.