You won't lose any sleep with the Restoration Equine Mask even with the lights on. The REM mask uses blue light blocking technology to promote the natural production of melatonin for a more restful night of sleep while being exposed to artificial light. 

• SKU: REM
• Eases Travel Anxiety
• Aids horses with Eye Injury
• Facilitates melatonin rise needed for sleep and recovery
• Use in areas where lights stay on