Cheng developed a prototype of a superhydrophobic sweat sensor to measure vapor from insensible perspiration. The material — a superabsorbent hydrogel composite on a porous substrate sandwiched ...

Sweat cools your body through evaporation. When you sweat, small water droplets collect on your skin. As those droplets evaporate, they take energy from your body, cooling you, and from the air ...

The more water vapor there is in the air, the more humid things will be and, generally, the hotter it will feel to the human body. For example, according to a chart from the National Oceanic and ...

But the more water vapor in the air, the hotter and stickier your skin will feel, and the harder it is for your body to cool off. Once temperatures drop, the moisture in the air will condense.