The Cooling Gle Eye Mask is filled with propylene glycol and water. Provide you or your client with a soothing relief during facial services and medical treatments. Use Chilled to recovery for cosmetic surgery, microdermabrasion, chemical peels, and laser procedures. Use simultaneously with eye care formula for improved results. Mask fastens with an elastic strap, which can be easily take out. Keep in Refrigerator or place in freezer for 10-15 mins before use.