Eyeseals 4.0 are effectively used for nighttime dry eye relief, to shelter from C-PAP masks and to promote deep sleep and relaxation. Soft and flexible, this hydrating Eyeseals 4.0, gently shelters eyes from drafts and low humidity environments, preserving precious tears, soothing dry, tired eyes while blocking light. The moisture rich environment created, naturally keeps eyes comfortable throughout the evening while hydrating sensitive eyelid and surrounding skin.