Key Benefits

• Blocks 99% of blue, green, and violet light.

• Polarised lenses reduce glare without altering natural vision.

• Scratch-resistant lenses with anti-reflective polycarbonate coating.

• Lightweight foam-sealed frame with flexible, pressure-free arms.

• EEG-verified calming effect supporting melatonin and deep sleep.

TrueDark Twilights Classic is built for serious sleep protection when light exposure cannot be avoided. Featuring deep red lenses, they block 99 percent of blue, green, and violet light, as well as 99 percent of UVA and UVB rays. This helps preserve natural melatonin production and support a healthy sleep cycle.

The practical sport-style design includes a full-coverage foam barrier that seals out stray light, creating a darkness-like effect even in bright environments. A lightweight polycarbonate frame with flexible TR90 arms stays comfortable during evening routines and is gentle enough to fall asleep in. EEG data shows brainwave activity can shift into a calmer alpha state within minutes, helping the body unwind faster. Ideal for night-time screen use, travel, and light-sensitive sleepers.

MEASUREMENTS
Frame Width: 142mm  
Lens Width: 65mm  
Lens Height: 40mm  
Bridge: 20mm  
Arm: 120mm

Light doesn’t just help you see. It tells your brain how to feel and when to switch on or off. TrueDark focuses on managing what the brand calls “junk light” — artificial blue, green, and violet wavelengths from screens and modern lighting that interfere with your circadian rhythm. Unlike basic blue-light glasses, TrueDark lenses are designed to filter specific wavelengths at different times of day, helping reduce overstimulation and support more natural sleep and focus patterns. Plus, TrueDark is the only brand backed by EEG-verified research showing brainwaves can shift from alert beta states into calmer alpha and even deep-sleep delta states. It’s a practical tool for navigating modern light exposure, not a fashion accessory.

TrueDark was founded by Dave Asprey after years of struggling with poor sleep caused by artificial lighting. When standard blue blockers failed to make a meaningful difference, he worked with neuroscientists and circadian biology experts to develop a more complete light-management system. The insight was simple: blue light isn’t the only problem — green and violet light also affect brain signalling when exposure happens at the wrong time. TrueDark lenses were created to block the right wavelengths at the right moments, helping people better align with their natural 24-hour rhythm. Designed as a sleep, focus, and performance tool, TrueDark exists to help people feel better by fixing light at the source.

With our Healf Curation Process, we do the work for you. Shop with confidence knowing that every item has been tried, tested, and curated for you.

Learn more about each step—Brand Discovery, Expert Validation, and Community Testing—here.

When: Nighttime. 30 minutes before bed.

Where: Wear just before sleep, or if you wake at night for a drink, bathroom break, or childcare. They protect your rhythm so you can fall back asleep quickly.

Why: Twilight lenses block 99% of junk light with a deep red tint. EEG data shows they shift brainwaves from alert (beta) to calm (alpha) within minutes, helping you fall asleep fast and stay asleep.