It's called D3O but stumbled accross it by accident.
I would like to see some more manufacturers using it.
Link to their site: http://www.d3o.com/
Vid that explains what it does:

I have an i-phone case made of the stuff. I dropped my phone on its edge last week onto a hard tile floor from about three feet. I expected a shattered display, but the phone came through in perfect condition.

I think this stuff is similar. http://www.revzilla.com/product/revit-s ... -protector

.... Its a good idea but only in certain aspects of gear.... The harder you hit it /the more force imparted to it, the harder the substance goes - downside is that a hard substance will impart more force to you the squishy organic bit that it's covering! Used in combination with other shock absorbers though it will make for an interesting armour....




I also have the iPhone case and it has certainly stopped the phone from exploding when it hits concrete on many an occasion!

Appears to behave a lot like Sorbothane. Does Forcefield use their material?

Nope - forcefield do not use D3O.....

Belstaff use D30 in their jackets.