Sleep is the most powerful performance tool you're not optimizing.
Every product at Somnos is built around a specific biological mechanism. This page explains the science — what's happening in your body at night, what breaks it, and what fixes it.
Sleep architecture
What a healthy night looks like
A full night cycles through four stages roughly every 90 minutes. Each stage does something different. Most people get too little of the stages that matter most.
8 hours across 4 sleep cycles
Common sleep problems
What's breaking your sleep — and the fix
Select a problem to see the science and the products that address the root cause.
The problem
Mouth breathing during sleep
Most people breathe through their mouth at night without knowing it. This bypasses the nose — your body's natural air filter, humidifier, and nitric oxide generator — and disrupts the entire chemistry of sleep.
60%of adults mouth-breathe during sleep at least part of the night
What it causes
Poor HRV, fragmented sleep, snoring
Mouth breathing reduces blood oxygen saturation, increases snoring and micro-arousals, lowers HRV, and triggers the sympathetic nervous system — keeping you in lighter, less restorative sleep all night.
25%increase in nitric oxide when switching to nasal breathing
The mechanism
The nasal passage produces nitric oxide — a vasodilator that lowers heart rate and blood pressure. Nasal breathing also warms and humidifies air, improving oxygen exchange. The Bohr Effect explains why: higher CO₂ from controlled nasal breathing allows red blood cells to release more oxygen to tissues. Mouth breathing short-circuits all of this.
Products that address this
Breathing
Nasal Protocol Tape
Keeps the mouth closed — enforces nasal breathing passively overnight.
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Breathing
Airflow Strips
Opens the nasal passage externally — reduces airflow resistance.
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Breathing
The Jaw Anchor
Supports jaw closure for people who find tape alone insufficient.
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The problem
Blue light after sunset
Screens, overhead LEDs, and most modern bulbs emit blue light at 480nm — the exact wavelength that suppresses melatonin. Your body was designed to wind down with sunset. Most people don't experience sunset anymore.
3 hrsaverage melatonin delay caused by evening screen use
What it causes
Delayed sleep onset, lighter sleep, groggy mornings
When melatonin is delayed, your sleep pressure doesn't peak when you want it to. You fall asleep later, your sleep is shallower, and your circadian rhythm drifts — making every night slightly worse than the last.
50%melatonin suppression from just 10 lux of light during sleep
The mechanism
Melanopsin-containing retinal ganglion cells detect light at ~480nm and signal the suprachiasmatic nucleus (SCN) — your brain's master clock — to suppress melatonin. Amber light at 590nm+ does not activate melanopsin. Switching bedroom lighting to amber means your melatonin rises naturally from ~9pm onward, just as evolution intended.
Products that address this
Light Environment
The Amber Bulb
630nm — zero melanopsin activation. The only bulb your bedroom should have after sunset.
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Light Environment
Blackout Shield
100% blackout. Installs in seconds, no drilling required.
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Nervous System
The Silk Veil
100% mulberry silk. Blocks residual light while slowing your heart rate.
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The problem
Going to bed still wired
Your nervous system doesn't have an off switch. The sympathetic state that carries you through the day needs active downregulation. Most people skip this entirely — then wonder why they can't fall asleep.
90 mintime the nervous system needs to fully shift from sympathetic to parasympathetic
What it causes
Racing thoughts, long sleep onset, light sleep
Elevated cortisol at bedtime raises heart rate, increases core body temperature, and suppresses melatonin — making both falling and staying asleep harder. This is the most common driver of insomnia in high-performing people.
40%of people with insomnia have clinically elevated nocturnal cortisol
The mechanism
The vagus nerve is the fastest pathway to shift from sympathetic to parasympathetic. Stimulating it via breathing, pressure, temperature, and vibration measurably lowers heart rate and cortisol within minutes. This is the physiological basis of every product in the Somnos nervous system protocol.
Products that address this
Nervous System
The Silk Veil
Gentle ocular pressure activates the oculocardiac reflex — slows heart rate.
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Nervous System
The Cervical Rest
Correct cervical alignment reduces vagus nerve compression during sleep.
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Nervous System
The Noise Protocol
Brown noise suppresses thalamic gating — quiets intrusive thoughts before sleep.
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The problem
Your bedroom is working against you
Most people have never considered their bedroom as a biological system. Temperature, air quality, CO₂ levels, and sound all directly affect how deeply you sleep — and most bedrooms are poorly optimized for all four.
20%reduction in slow-wave sleep in rooms with elevated PM2.5 and VOC levels
What it causes
Micro-arousals, shallow sleep, stuffy mornings
A room above 68°F prevents the core body temperature drop needed to trigger deep sleep. CO₂ above 1,000ppm increases respiratory rate and fragments sleep architecture. Particulate matter activates inflammatory responses that shift you toward lighter sleep stages.
65–68°Foptimal bedroom temperature for maximum slow-wave sleep
The mechanism
Sleep onset requires a 1–2°F drop in core body temperature — triggered by peripheral vasodilation. A cool room accelerates this. Simultaneously, CO₂ buildup in a closed bedroom raises your respiratory rate during sleep, increasing arousal probability. Clean, cool, dark, and quiet isn't aesthetic preference — it's biological necessity.
Products that address this
Environment
The Clean Air Pod
HEPA + VOC filtration — removes particulates that trigger nocturnal inflammation.
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Environment
Blackout Shield
Total light elimination — protects melatonin through the full sleep cycle.
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Environment
The Noise Protocol
Masks environmental sound — prevents noise-triggered micro-arousals.
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The problem
Cortisol that won't come down
Cortisol should peak 30 minutes after waking and trough near midnight. Modern life flattens this curve: late caffeine, evening stress, screens, and irregular schedules keep cortisol elevated when it should be at its lowest.
27%reduction in cortisol after 8 weeks of consistent circadian hygiene
What it causes
Can't fall asleep, wake at 3am, unrefreshing sleep
Elevated midnight cortisol is the most common physiological cause of both sleep onset insomnia and early morning waking. It also suppresses growth hormone release — which only happens in deep sleep — impairing overnight physical recovery regardless of hours in bed.
3ammost common waking time for people with elevated nocturnal cortisol
The mechanism
The hypothalamic-pituitary-adrenal (HPA) axis regulates cortisol in response to stress and light signals. When the circadian clock receives light at the wrong time, or when psychological stress keeps the HPA axis active into the evening, cortisol remains elevated. This directly antagonizes melatonin and keeps the brain in a state of low-level alertness.
Products that address this
Light Environment
The Dawn Clock
Gradual sunrise triggers the cortisol awakening response at the right time — anchoring your circadian clock daily.
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Light Environment
The Amber Bulb
Eliminates evening blue light — allows natural cortisol trough and melatonin rise.
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Recovery
The Grounding Sheet
Three published RCTs show grounding reduces nocturnal cortisol and improves overnight HRV.
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Common questions
The science — answered simply
Ready to build your protocol?
Every Somnos product targets a specific mechanism. Browse the catalog to find what your sleep is actually missing.
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