Fast hot flash relief
Palm cooling helps move excess heat out of your body. In Cryomedics user testing, many women felt a hot flash ease within 60 to 90 seconds.
the science behind our products
Palm cooling and cold plunges, explained.
Cold can help your body in more than one way. Cryo-1 cools or warms your palms for fast, portable relief. A cold plunge surrounds your whole body for a deeper reset. Explore how each method works, what the research shows, and which one fits your life.
Cryo-1
Cooling your hands cools the rest of you.
Your palms are one of the few places on your body built to release heat quickly. Cool the blood passing through them and that cooler blood travels back to your core within a minute or two. Warm them instead and the same road works in reverse.
What palm cooling does
Endurance +15-25%
Stanford researchers found that cooling the palms between sets extended endurance by 15 to 25%. Heat is often what ends a session, not your muscles.
Training volume +144%
In one Stanford study, experienced athletes increased their pull-up training volume by 144% over six weeks when they cooled their palms between sets.
Faster heart-rate recovery
Palm cooling helps your body release stored heat after hard exercise. As your body cools, your heart rate can settle faster.
Fast relief. No ice or water.
Cryo-1 reaches its target cooling range in about two minutes. Use it at your desk, beside your bed, or between sets with no ice, water, or setup.
A calmer nervous system
Cooling the palms, or the vagus nerve on the side of your neck, activates the body's rest-and-recover response. Many users feel calmer within minutes.
Get better sleep.
Palm cooling before sleep helps the body get to sleep faster. Keep Cryo-1 beside your bed for fast cooling when night sweats wake you.
Warm up from chills
Switch to warm mode for the chills that can follow a hot flash. It also brings fast comfort to cold hands at home, work, or the gym.
STANFORD PALM-COOLING RESEARCH
Results you can measure.
Stanford researchers Dr. H. Craig Heller and Dr. Dennis Grahn studied palm cooling and thermal fatigue. Their work is the basis for how Cryo-1 is designed.
+15-25%
Longer endurance in controlled palm-cooling studies.
+144%
More pull-up training volume over six weeks in experienced athletes.
BPM↓
Palm cooling helped heart rate settle sooner after hard effort.
Why the palms
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Your palms are natural radiators
The skin on your palms, soles and face holds dense clusters of blood vessels called arteriovenous anastomoses — AVAs. They are shortcuts that send blood straight from artery to vein, right under the surface. When you overheat, your body opens them to let heat out. Cooling these areas sends cooled blood throughout your body, cooling you down fast.
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Cool, not cold, is the point
The useful range is about 54-61°F (12-16°C). Cool enough to pull heat out, warm enough that your vessels stay open. Ice does the opposite: it clamps the vessels shut and heat exchange stops, which is why an ice pack feels dramatic and does less.
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The same pathway can warm you
Warm your palms and your blood carries that heat back into your body. Cryo-1 uses the same surface for cooling and warming, so one device works in both directions.
Where palm cooling falls short
Cryo-1 sheds heat into the air around it and comes with some limitations outdoors. Once the air is hotter than about 80-85°F it is unable to cool efficiently. Plan your use and expectations accordingly.
All-in-one Cold Plunge
Two to five minutes. A full-body reset.
Cold water gives your whole body a short, controlled challenge. Your breathing, circulation, and nervous system respond at once. With regular use, cold plunging can support your energy, workout recovery, sleep, and response to stress.
What cold plunging does
Natural energy
Cold water wakes up your nervous system and releases hormones tied to alertness. Many people step out feeling awake, clear, and ready to move.
Workout recovery
Sports medicine has used cold water for decades to support active recovery and reduce inflammation.
Better sleep
Plunging engages the autonomic nervous system — the same system that governs how you settle down. Many people sleep better on the days they use it.
Immune support
Immersion stimulates white blood cells and causes the lymphatic system to contract, moving fluid through the lymph nodes. Some research links regular cold exposure to fewer respiratory infections.
Stronger under pressure
The first seconds challenge your breathing and focus. Learning to stay calm in the water can build confidence that carries into the rest of your day.
Mood
There is good evidence that regular cold exposure supports mood over time. It is not a treatment, but plenty of people find it a steadying part of the day.
Pain relief
Consistent cold immersion raises norepinephrine well above baseline. That is associated with reduced inflammation and relief from ongoing aches.
Stress relief
Cold water therapy has been studied as a supplement for stress, with reductions in cortisol. Learning to stay calm in cold water carries over to staying calm elsewhere.
What happens when you cold plunge
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The first 30 seconds
Cold water makes you gasp, breathe faster, and pull blood toward your core. Stay still and focus on slow, steady breaths. The strongest shock usually passes quickly.
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Norepinephrine and inflammation
Cold immersion raises norepinephrine several times above baseline. That is the mechanism behind the alertness people feel and much of the reported relief from soreness and inflammation.
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Training your calm
Cold water switches on your stress response. Slowing your breath while your body wants to react teaches you to stay steady under pressure.
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How much is enough
A useful session can be short. aim for Two to five minutes. Start at a temperature that lets you control your breathing and build a steady routine. Colder and longer are not always better.
Portable relief
Cryo-1palm cooling device
Cordless, quiet and dry. Made for hot flashes, performance boosts and everyday heat relief.
$179$199
Explore Cryo-1
Full immersion
All-in-one Cold PlungeGen 4
The all new 'All-in' plunge. Chill to 32ºF or heat to 104ºF - plug it in, set your temperature, get in.
$4,999$7,990
Explore the plunge