Since no one wants to carry around a wet suit in her gym bag, most gyms provide plastic bags for your postswim convenience. One thing the world could definitely use less of, though, is plastic bags.
Since we all have some form of plastic bags — produce bags, bread bags, or shopping bags with handles — tucked into random drawers in our kitchens, taking one to the pool for your wet suit is an easy way to decrease your carbon footprint. I stuff extra plastic bags into my gym bag so I always have one available when I am done swimming. This is just one more way to reuse those ubiquitous plastic bags.