Lifestyles SKYN condoms are one of only a handful of available brands of non-latex condoms. These polyisoprene condoms were FDA approved in November 2008 for the prevention of pregnancy as well as for sexually transmitted diseases.
In the US, the Marines are part of the Navy. The Navy is the seagoing part of the US military. They man the ships, and submarines, and fly the jets from aircraft carriers. The marines were originally soldiers specially trained for ship to ship combat back in the days of sailing ships.
The Navy and the Marines are separate branches of the U.S. military. The Navy deals with control of the seas through attack, defense and transport of military equipment. The original purpose of the Marines was to capture and control beach heads, but it expanded to involve more ground combat operations.