Special Uniform
Submariners, unlike other sailors ivy, wear a distinctive type of uniform. Sure, they still have insignia and colors of the US Navy, but there’s a twist to it. Deep blue overalls (like those worn by other sailors on board a submarine) are made of lint-free polyester and are worn by submariners instead.
It’s a long story. The reason is that lint might clog up the onboard air filtration system. This jacket also acquired a comical name – poopie suit.