Completely See Through Stuff?!

If its completely see through how will you know its there?? Thats what I want to know! If they make this stuff how many people will just try to walk through it and will severly injure themselves in the process. In fact there's probably going to be a class action about this product before its even released, and I'm the man to run it. Millions for all is my guarantee*! Anyway, what I can gather from this bodgy website and my excellent japanese is that this completely see through stuff is made by magic and pixies and should be available very soon.

*Not a guarantee