This power allows the Jedi to surround his body with a Force-generated shield. The shield can be used to repel energy and physical matter away from the Jedi’s body, down to the molecular level.
The shield acts as STR+1D armor to all energy and physical attacks made against the Jedi including non-directional attacks such as gas clouds and grenade blasts. The shield is not particularly strong, but can sometimes be just enough to protect the Jedi from serious injury.