0 a piece of clothing that fits the top half of the body tightly, made of special material and worn on its own or under a wetsuit for activities such as surfing, to prevent the skin from being rubbed and to protect against the sun:
She rides toward shore, sunlight bouncing off her neon rash guard.
Real Hawaiians didn't like add-ons: they rejected board grips, gloves, rash guards, stretch shirts, anything that would come between them and the wave.
They wear turtleneck, long-sleeved rash guards into the water and so much sunblock their faces look green.
You will wear a life jacket and possibly a rash vest (such as those worn in surfing) underneath it.
The high visibility rash guard will give you added comfort under a wetsuit or on its own for added sun protection.
The original purpose of a rash vest was to stop surfboard rashes on surfers whilst on their boards.
