The majority of tourniquets are not made for exposure, degrade rapidly from exposure, and are classified as general use. Conversely, a Marine Tourniquet is made specifically for marine environment use, and its materials are made for exposure.
UV Exposure - Ability to Withstand ASTM G155-13 UV Exposure of at least 6-months without significant loss in strength.
Saltwater - ability to pass ASTM B117 salt fog test, more specifically Mil Std 810
Hydrophobic - Materials should not absorb water.