Dive reflex · Independent research
Mechanism of the human diving response
Gooden, Integrative Physiological and Behavioral Science, 1994. Facial contact with water combined with breath-holding triggers a vagal slowing of the heart rate.
The Science
The Science Behind Frosteam Harmony
Three technologies in one device: a Thermo-Cooling Facial Cold Plunge actively held at 1–4 °C, Nano-Ionic Steam and a Built-in Aromatherapy Diffuser. How each one works, and why alternating heat and cold matters.
Harmony combines three well-studied responses: warmth that softens the skin, cold water on the face that narrows surface blood vessels and triggers the mammalian dive reflex, and scent processed by the olfactory system. Below: how each system works, and what independent research does and does not show.
Shop HarmonyPerformance at a Glance
The numbers behind the ritual.
Cold
1–4°C
Cold actively held in the basin. No ice, nothing to set.
Steam
≈70°C
Nano-ionic steam, an ultra-fine mist.
Ritual
10min
The complete hot–cold ritual, start to finish.
Device
3-in-1
Steam, cold therapy and aromatherapy in one device.
01 — 04 · System overview
The Engineering Behind Harmony
Three systems, one device.
Harmony brings three independent systems together in one countertop device, all run from a single front touch panel:
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01 · Thermo-cooling
A thermo-cooling system that chills the water of a removable basin and holds it between 1 and 4 °C.
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02 · Steam
A nano-ionic steam generator fed by its own water tank.
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03 · Aromatherapy
An aromatherapy diffuser with a dedicated essential oil bottle.
Because the basin stays cold between sessions, the cold plunge is ready instantly. No ice, no app, no extra device.
0204 · Thermo-Cooling System
Cold, actively held at 1–4 °C.
The Frosteam Thermo-Cooling System actively cools the water in the basin and holds it between 1 and 4 °C (34–39 °F). When the water warms above that range, cooling restarts on its own: there is no temperature to set and no ice to prepare.
Cold water on the face makes the small blood vessels of the skin narrow (vasoconstriction); when you lift your face out, circulation returns. This is what gives the visibly tighter, less puffy look right after a plunge.
1–4 °C
Actively held. Automatically.
- No temperature to set
- No ice to prepare
- Restarts on its own
Illustration · basin held between 1 and 4 °C
0304 · Nano-Ionic Steam
An ultra-fine mist at about 70 °C.
Harmony's steam generator produces an ultra-fine mist at about 70 °C, much finer than the steam from a kettle or a bowl of hot water. The warm mist softens the outer layer of the skin and helps prepare it for cleansing and for the products you apply next.
≈ 70 °C
Ultra-fine mist · temperature- 01Softens the outer layer of the skin
- 02Helps prepare it for cleansing
- 03Readies it for the products you apply next
Illustration · approximate steam temperature
0404 · Built-in Aromatherapy Diffuser
Scent, built into the ritual.
The built-in diffuser releases your essential oil from a dedicated bottle, with intensity and duration set from the front touch panel. Scent is processed by the olfactory system, which is closely linked to the brain areas involved in emotion and memory: one reason a familiar scent can make a routine feel calmer.
Source
Your essential oil, from a dedicated bottle
Intensity
As subtle or present as you like
Duration
Set the length that suits you
Illustrative controls · not the device interface
The Science of Contrast Therapy
Warm first, then cold.
Harmony's ritual alternates the two: warm nano-ionic steam first, then a short facial immersion in cold water. Plunging the face into cold water also triggers the mammalian dive reflex, a natural response in which the heart rate slows through the vagus nerve, part of the parasympathetic nervous system.
How contrast therapy works →
The mammalian dive reflex, explained →
How it feels: benefits →
Heart rate · relativeFace in cold water →
Before
Regular rhythm
In cold water
Heart rate slows
Illustration · not measured data
Research describes these responses in the body in general; individual experience varies.
Research & Scientific Evidence
What independent research says.
Independent studies on the mechanisms Harmony relies on, with a link to each original source. They describe general physiological responses; they are not studies of the Harmony device. Frosteam's own tests will be listed separately, clearly labelled as internal.
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Skin & cold · Independent research
Skin Blood Flow in Adult Human Thermoregulation
Charkoudian, Mayo Clinic Proceedings, 2003. Reviews how the nervous system narrows and widens skin blood vessels to regulate temperature.
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Facial cold · Independent research
Cold-Water Face Immersion Per Se Elicits Cardiac Parasympathetic Activity
Kinoshita et al., Circulation Journal, 2006. Cold-water face immersion increased markers of vagal (parasympathetic) activity in healthy adults.
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Dive reflex · Independent research
The Mammalian Diving Response: An Enigmatic Reflex to Preserve Life?
Panneton, Physiology, 2013. Reviews the neural control of the diving response (breath-hold, slower heart rate, vasoconstriction) across mammals.
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Aromatherapy · Independent research
Essential oils used in aromatherapy: A systemic review
Ali et al., Asian Pacific Journal of Tropical Biomedicine, 2015. Reviews how essential oils are delivered (including inhalation), their uses and their safety.
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Dive reflex · Reference
Physiology, Diving Reflex
Godek & Freeman, StatPearls (NCBI Bookshelf). Face immersion with breath-holding triggers a slower heart rate and peripheral vasoconstriction.
Our Innovation & Expertise
Designed and refined over thousands of hours.
Harmony was developed with 25+ experts in skincare, clinical research and product design, through more than 15,000 hours of testing and refinement.
Harmony is patent pending: an international patent application has been filed under the Patent Cooperation Treaty (PCT), a system of 150+ member countries. Harmony's design is registered as an industrial design in several jurisdictions, including Canada, the European Union, the United Kingdom and Japan.
Frosteam Harmony
The science, in a 10-minute ritual.
Thermo-Cooling Facial Cold Plunge, Nano-Ionic Steam and a Built-in Aromatherapy Diffuser, in one device.