How it cools
Running turns most of your energy into heat. Your body gets rid of it by sweating, and sweat only cools you when it evaporates. The Cooldown Cap gives evaporation more water to work with, on your head, one of the places your body releases heat.
Heat
Only about a fifth of the energy you produce moves you forward. The rest becomes heat that has to leave your body, or your pace drops.
Evaporation
Your body carries heat to the skin and loses it when moisture evaporates. Ultra Cool Tech calls the heat removed this way cooling watts.
Fabric
Water poured over your head mostly runs off, and what lands on the ground cools nothing. This fabric holds the water and spreads it over a large surface, so it evaporates where you need it.
Airflow matters. A little moving air speeds evaporation up a lot, and the effect continues for as long as the fabric stays damp.
Two crowns
Same cap, same cooling fabric. The only difference is the top panel, and it trades airflow against sun cover.
Laser-cut holes across the top panel let air move through the crown.
A solid top panel covers the scalp fully. The side panels stay perforated.
Guide
The fabric is stiff when dry. Hold the cap under a tap, or dunk it, until it is wet through and soft. Tap water is fine.
Shake off the excess. It should be wet, not dripping.
Put it on and go. Moving air drives the evaporation, so you notice it most once you are running.
As the fabric dries, the cooling fades. Pour water over the crown at a fountain or from your bottle and it picks up again.
Not wearing them? Slide the arms into the sleeve on each side of the cap and they stay put.
After the run, rinse the cap in fresh water and let it air dry. It dries stiff again. That is normal.
Skin gets used to a steady cool sensation, the way an ice cube in your hand feels less cold after a minute. If the fabric is damp and air is moving, the cap is still doing its job.
No. The Cooldown Cap cools with water only. Nothing to load, nothing to melt, and nothing extra to carry on your head.
For as long as the fabric is damp. How long that takes depends on heat, humidity and wind, so we do not quote a number. Re-wet it when it feels dry.
We do not quote a temperature drop. It changes with the conditions and with how hard you run, and we would rather you judge it on your own route.
Evaporation is slower in humid air than in dry heat, so airflow matters more. Expect to notice the cap most while you are moving or in a breeze, and less when you stand still.
Vented if you want the most airflow or mostly run outside the strong sun hours. Closed if you run in midday sun, or have a sensitive scalp, thin or shaved hair.
No. The cooling fabric is stiff when dry, so the Cooldown Cap is made to be worn wet only. For a cap you wear dry, pick the Zenith Cap.
Shake it out before you put it on and it should not. It will feel damp on your head. That is how it works.
Cooling fabric by Ultra Cool Tech. The heat figures on this page come from Ultra Cool Tech's published explanation of cooling watts.
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