Next time you’re riding on a warm to hot day and feel the heat on your face touch your cheek with your fingers. Most likely your face feels dry but you know your sweating, probably a lot. If you need to prove that just stop for a few minutes. In seconds you’ll be dripping.
So why does your face feel dry? Because even though your body is cranking out sweat to maintain a constant core temperature the evaporation rate at the temperature and wind speed you’re experiencing on the bike caused the water to evaporate almost immediately. Your body is doing the best it can to stay cool but remember, your face felt warm or even hot.
Now start riding again and dump a little water over your face. Feels cooler instantly. That’s why we do it. But you’re already sweating, so what’s the difference. Well beside the fact that the water may be cool the real benefit is that you’ve just added 3-4 ounces of cooling capacity [the water] over your skin. This is several orders of magnitudes more water than your body can “sweat-out” in the same unit of time in order to lower your skin temperature and conduct heat away from your bodies core.
This is exactly how / why using SPRUZZA works. It adds “thermal-mass” the additional cooling capacity of larger volumes of water per unit time than your body can sweat. This combined with the wind chill effect of riding between 15-25 mph will lower your skin temperature 15-25 degrees F. That is a very significant improvement in the thermal gradient [difference] between the blood flowing through your skin capillaries and the skin itself.
Since heat is conducted from higher temperatures to lower and the rate is proportional to the temperature difference [assuming conduction coefficients and surface areas are the same] lowering your skin temperature 15-25 degrees can be a 3 to 5 fold increase in the rate of conduction.
Lastly, here’s the really COOL thing. Cooling down with SPRUZZA only uses 3-5 milliliters of water [0.1-0.2 ounces] of water instead of the 3-4 ounces [89-148 milliliters] you use from your water bottle. It’s only the water that sticks to your skin that cools you down.
The rest is just wasted water you’ll probably wish you had for drinking.