is a precision-engineered evening blue light blocking eyewear in Ra Optics' most classically sophisticated frame, the Nate, named after Nathaniel Kleitman, the father of modern sleep research and author of the foundational 1939 work Sleep and Wakefulness, delivering the same science-backed Sunset lens technology that blocks 100% of blue light and most green light from sunset to sleep, in rich tortoise shell square frames with subtle curves and a clear saddle bridge, for those who prefer a frame that wraps with comfort, refinement, and purpose.

Your body was built to follow the sun. When natural light fades at sunset, the pineal gland reads that shift in the light spectrum as a signal to release melatonin, the hormone that initiates sleep, slows metabolism, and opens the window for the deep cellular repair your immune system, hormones, brain, and skin depend on. Modern artificial lighting, including LED bulbs, televisions, phones, and computer screens, emits the same blue and green wavelengths as midday sunlight. Your brain cannot distinguish between them. Every hour you spend under artificial light after sunset is an hour your body receives a signal that it is still noon, suppressing melatonin, delaying sleep onset, shortening your deep sleep window, and compressing the nightly repair processes that determine how you feel, look, and perform the next day.

Sunset Lenses filter the 380 to 540 nm wavelength range, blocking 100% of blue light and most green light, with a complete cut-off around 500 nm and less than 5% transmission until approximately 550 nm. Beyond 550 nm, transmission rises steeply to near-full levels around 600 nm, preserving enough ambient visibility for comfortable evening activities while eliminating every wavelength the brain uses as a wakefulness signal. Blocking 77% of total light and allowing 23% to pass through, the result is an evening environment that mimics what the human nervous system evolved to experience after dark, without requiring you to sit in complete darkness.

The Nate frame is named after Nathaniel Kleitman, an American physiologist and sleep researcher who served as Professor Emeritus in Physiology at the University of Chicago, recognized as the father of modern sleep research and the author of the seminal 1939 book Sleep and Wakefulness. No frame name in the Ra Optics lineup carries a more fitting tribute for a sleep-supporting product. Square frames in a rich tortoise shell hue with subtle curves and a clear saddle bridge. Medium fit, with a wrap-around style that sits securely and comfortably for extended evening wear. Crafted from Italian Mazuchelli Acetate and German-engineered steel. Every pair includes a luxury branded case and cleaning cloth with free U.S. shipping, returns, and exchanges.

Sunset Lenses pair with Daylight Lenses for complete 24-hour circadian light management. See the Nate Daylight listing in the SOLUDE Wellness Tools collection.

Key Benefits:

• Blocks 100% of blue light and most green light from sunset to sleep
• Filters the full 380 to 540 nm sleep-disrupting wavelength range
• Supports natural melatonin production without supplements or sleep aids
• Supports faster sleep onset and deeper, more restorative sleep
• Supports the full nightly cycle of cellular repair and regeneration
• Supports hormonal restoration during sleep including growth hormone and cortisol rhythm
• Reduces nervous system overstimulation and evening screen fatigue
• Supports cognitive function, mood, and energy the following day through improved sleep quality
• Rich tortoise shell square wrap-around frame in a comfortable medium fit
• Named after the father of modern sleep research — Nathaniel Kleitman
• Premium Italian Acetate and German steel construction built to last
• Includes luxury branded case and cleaning cloth
• Free U.S. shipping, returns, and exchanges
• Non-prescription, non-habit forming, no substances required

Lens Specifications:

• Filters 380 to 540 nm, the full range of sleep-disrupting blue and green light wavelengths
• 100% blue light blocking
• Complete cut-off around 500 nm, less than 5% transmission to approximately 550 nm
• Blocks 77% of total light, allowing 23% to pass for comfortable visibility
• Amber/red tint for maximum melatonin support
• Available non-prescription only

Frame Details:

• Name: Nate (named after Nathaniel Kleitman, father of modern sleep research)
• Shape: Square with subtle curves and wrap-around style
• Bridge: Clear saddle bridge
• Frame: Rich tortoise shell hue
• Fit: Medium
• Material: Italian Mazuchelli Acetate and German-engineered steel
• Gender: Unisex
• Includes: Luxury branded case and cleaning cloth

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How to Wear

Put on your Nate Sunset glasses at or after sunset, or at least two to three hours before your intended sleep time. Wear them any time you are exposed to artificial light in the evening, including screens, LED and fluorescent lighting, television, and overhead household lights. Keep them on until you are ready to sleep. Remove in complete darkness or when lights are off.Note: Sunset Lenses are not ideal for color-sensitive tasks, nighttime driving, or situations where full color clarity is required. For these situations the Nate Daylight Lens is the appropriate choice.

Ra Optics Nate Sunset Lens glasses are premium evening blue light blocking eyewear available at SOLUDE Wellness & Beauty in the Wellness Tools collection. The Nate frame is named after Nathaniel Kleitman, the father of modern sleep research, and features Italian Mazuchelli Acetate and German-engineered steel in a square tortoise shell silhouette with subtle curves, clear saddle bridge, and wrap-around medium fit, including a luxury branded case and cleaning cloth. Sunset Lenses filter 380 to 540 nm, blocking 100% of blue light and most green light, with a complete cut-off around 500 nm and less than 5% transmission to approximately 550 nm, blocking 77% of total light while allowing 23% for comfortable visibility. Designed to be worn from sunset to sleep. Supports natural melatonin production, faster sleep onset, deeper restorative sleep, nightly cellular repair and regeneration, hormonal restoration, and reduced nervous system overstimulation. Non-prescription. Free U.S. shipping, returns, and exchanges. Pairs with Ra Optics Nate Daylight Lenses for complete 24-hour circadian light management.