How can you remove that sour smell from a life jacket?

To remove the sour smell from a life jacket, first, rinse it thoroughly with fresh water to remove any salt or dirt. Then, create a mixture of water and mild soap or vinegar and gently scrub the jacket with a soft brush. Rinse again with clean water and allow it to air dry completely in a well-ventilated area, preferably out of direct sunlight. If the smell persists, consider using a specialized fabric freshener or odor eliminator designed for marine equipment.