The Probert Encyclopaedia of Heraldry

VAIR

In heraldry, vair is one of the furs composed of several pieces, silver and blue (argent and azure), cut to represent little shields or perhaps the flower of the campanula, and opposed to each other in rows.
Vair also describes a shape of shield, straight and angular, broadest at the chief, indented just below the chiefs and tapered from the dexter and sinister bases to a point at the middle base.
Research Vair