The mask contains Silica beads which naturally attract moisture from the air and release it when microwaved. Heating the mask for 20 seconds will provide soothing moist-heat relief for 5-6 minutes. EyeEco supplies complimentary samples of liners with the D.E.R.M. which can be moistened and applied to the mask prior to heating to extend the treatment to 7-9 minutes. D.E.R.M.™ is hypoallergenic and can also be used to create cold therapies for allergy relief.