I would say the eyebrow
The eyebrows.
It prevents sweat.
The polyurethane is non-porous, which prevents sweat evaporating. Our bodies sweat to cool us down when we're hot. The silver coating reflects heat back towards the body.
headbands are bands that go around your head to prevent sweat dripping onto your face :)
Not necessarily, no.
so that sweat dripping down hour back is obsorbed by the hairs
Eyebrows protect the eyes from dust, sweat, and other foreign particles. The hair on your brow blocks sweat, water and dirt from dripping down from the forehead and irritating the eye.
The warmest parts of the human body have the most hair. We sweat there and the hair is for hygiene reasons, it collects the sweat. Just like eyebrows stop water from dripping into our eyes it stops the sweat from going anywhere.
All cats sweat. Not the dripping sweat we humans can do, but they do have patches of sweat glands in the face, belly, paw pads and tail area. Because the Sphynx is hairless it is more noticeable when they do sweat because you can feel it. When my three Sphynxes lay on me on a hot day, I can feel a a slight amount of dampness from them , but much more from me!
It sweats to cool your body off. The sweat prevents your body from overheating.
Plastic
No, they are just worn for leg sweat to keep from dripping down into your socks and they are worn for some flair and style.
No. A rubber band (known in some regions as a gum band) is made of rubber and latex and is used to hold objects together. A sweat band is made of terry cloth and is worn around the head to keep sweat from dripping into the eyes.