Feature:1. 99.9% Light Blocking: These protective glasses can effectively block 99.9% of destructive blue and green light, sending signals to relax your brain, ensure deep and restorative sleep.2. Sleep Aid Glasses: These sleep aid glasses can bring you a continuous sleep cycle, cultivate a healthier life style, effectively solve sleep deprivation and other health problems.3. 2100nm Wavelength: This blue light blocking glasses have a protective wavelength of 2100nm, avoiding excessive electronic light hazards, reducing eye fatigue, improving overall eye health.4. Applicable People: These sleep aid glasses are very suitable for people who frequently travel and work shifts, helping to reconnect sleep modes and improve time differences.5. Durable Material: This protective glasses are made of excellent PC material, lightweight and durable, with good corrosion and aging resistance, and has a long service life.Specification:Item Type: Sleep Aid GlassesMaterial: PCProtective Wavelength: 2100nm.Package List:1 x Protective Glasses1 x Storage Box1 x Eyeglass Cloth