Body Armor Fit For A Superhero

Body Armor Fit For A Superhero: "it's a mix of polyethylene glycol, a polymer found in laxatives and other consumer products, and nanobits of silica, or purified sand. Together they produce a 'sheer-thickening liquid' that stiffens instantly into a shield when hit hard by an object. It reverts to its liquid state just as fast when the energy from the projectile dissipates."