Type : Rashguard

A rash guard, also known as rash vest or rashie, is an athletic shirt made of spandex and nylon or polyester. The name rash guard reflects the fact that the shirt protects the wearer against rashes caused by abrasion, or by sunburn from extended exposure to the sun.

As you may have guessed the origin is from surfing & diving, and was then later incorporated into fightwear & gymwear.

Also helps to promote bloodflow to muscles and aids in faster recovery.