It takes a 3D model and turns it into 2D shapes you can print out, fold, and glue together. Read the stickies, as they contain the files that you need and all the useful information:
:agree: what he said. trust me, it takes time but its so easy and worth it in the end. But one piece of advise: GO SLOW. take your time or your suit will be a like a bag of wet hammers.