Twilights Fitovers

Key Benefits

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

• Protects melatonin production, reduces night-time light sensitivity, and helps restore circadian rhythm.

• Polarised lenses reduce glare and block UV.

• Scratch-resistant lenses with anti-reflective coating.

• Wrap-around fit designed to layer over eyewear.

TrueDark Twilights Fitovers are designed to help the body switch into sleep mode naturally. Worn in the evening or during night waking, they block 99 percent of blue, green, and violet light that can suppress melatonin and delay rest. The wrap-around fitover design layers easily over glasses or readers, offering full coverage without pressure or distortion.

By reducing harsh artificial light, Twilights help calm the nervous system and prepare the brain for sleep. EEG data shows brainwave activity shifts into relaxed alpha states within minutes of use. This makes them ideal for winding down at night, late screen use, or moving around the house without disrupting circadian rhythm. Lightweight, durable, and practical, Twilights support deeper, more restorative sleep.

MEASUREMENTS
Weight: 5.7 oz  
Dimensions: 7 x 3 x 3 in  
Frame Width: 168mm  
Frame Height: 43mm  
Lens Width: 64mm  
Bridge: 19mm  
Arm: 132mm

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.