TrueDark® Twilights Classic eyewear, with dark red lenses, tells your body it’s dark, helping you get ready for a great night’s sleep. You can still see to read, watch TV or work on your electronic devices, while your sleep hormones shift to night mode. When your head hits the pillow, you’ll fall asleep quickly and sleep more deeply. Twilights glasses are also great for managing time-zone shifts, such as when traveling. Another great use is for people (such as new moms) who get up in the middle of the night and need to get back to sleep quickly. TrueDark is designed to be worn 30 minutes to 2 hours before going to bed or wanting to sleep. 100% of blue, green and violet wavelengths are blocked.PRODUCT DETAILSFor evening indoor useScratch-resistant polycarbonate red lenses with anti-reflective coatingStrong and lightweight polycarbonate frame with flexible TR90 armsBlack wrap-around frames with vented foam cushioning with maximum coverage to mitigate “light leakage”Blue light blocking—blocks 100% of blue, green and violet lightOptional clear polycarbonate prescription inserts (to be filled by wearer’s optician)ABOUT THE BRANDTrueDark® is a health and wellness technology brand that is committed to improving people’s health and performance by providing products, tools and education that help them control the light in their environment. Our goal is to help you sleep, feel and live better.