I bought a hard plastic case at a dollar store that weighs 1.2 oz. I couldn't find a hard case nearly that light anywhere else until someone on another forum suggested the dollar store. It has a thin layer of foam on one side only, so I use a piece of paper towel on the other side to fill up space. I don't recommend a soft-sided case if you will be carrying the glasses in your pack. I used one once and my glasses got bent.