The first thing to know when trying to figure out how scientist are creating the invisibility cloak is metamaterials. Metamaterials according to Wikipedia are "artificial materials engineered to have properties that may not be found in nature. Metamaterials usually gain their properties from structure rather than composition". The structure of these garments cause it to be highly reflective.
Pics of how this works
A short video explaining it all and showing the product in real life situations.
This is just the beginning
Soon you can creep around undetected. Yes its cool but is it a good or bad thing?