Here is the tutorial for this menstrual pad. It's a quick and easy project, and as it happens, is 100% useful! The only thing that I did differently was use cotton batting instead of terry cloth, and I only used two layers of the batting instead of the four layers. Oh, and I also put a layer of waterproof nylon on the bottom of the two layers of batting for extra protection.
Weird enough as it is to say this, I look forward to the full moon next month so I can use my new pads!