These do exactly what they are supposed to - keep you dry. I was worried they would be too small - I am a 33W and I ordered a Medium, but they have an elastic waist band which works great. There are zippers at the bottom of each leg that allow you to quickly & easily get them over your regular pants. They dry quickly, and can be zipped into a compact ball to take with you when not in use. I had a 1/2 hour ride to work this morning in the pouring rain. They did the job. My work pants stayed completely dry. Product arrived quickly from Back Country with clear instructions for return or exchange.