Vair (; from Latin varius "variegated"), originating as a processed form of squirrel fur, gave its name to a set of different patterns used in heraldry. Heraldic vair represents a kind of fur common in the Middle Ages, made from pieces of the greyish-blue backs of squirrels sewn together with pieces of the animals' white underbellies. Vair is the second-most common fur in heraldry, after ermine. Origins The word vair, with its variant forms veir and vairé, was brought into Middle English from Old French, from Latin "variegated", and has been alternatively termed (Latin, meaning "variegated work"). The squirrel in question is a variety of the Eurasian red squirrel, Sciurus vulgaris. In the coldest parts of Northern and Central Europe, especially the Baltic region, the winter coat of this squirrel is blue-grey on the back and white on the belly, and was much used for the lining of cloaks called mantles. It was sewn together in alternating cup-shaped pieces of back and belly fur, resulting in a pattern of grey-blue and grey-white which, when simplified in heraldic drawing and painting, became blue and white in alternating pieces. Variations In early heraldry, vair was represented by means of straight horizontal lines alternating with wavy lines. Later it mutated into a pattern of bell or pot-like shapes, conventionally known as panes or "vair bells", of argent and azure, arranged in horizontal rows, so that the panes of one tincture form the upper part of the row, while those of the opposite tincture are on the bottom. The early form of the fur is still sometimes found, under the name vair ondé (wavy vair) or vair ancien (ancient vair)(Ger. Wolkenfeh, "cloud vair"). The only mandatory rule concerning the choice of tincture is the respect of the heraldic rule of tincture, that orders the use of a metal and a colour. When the pattern of vair is used with other colours, the field is termed vairé or vairy of the tinctures used. Normally vairé consists of one metal and one colour, although ermine or one of its variants is sometimes used, with an ermine spot appearing in each pane of that tincture. Vairé of four colours (Ger. Buntfeh, "gay-coloured" or "checked vair") is also known, usually consisting of two metals and two colours. Traditionally vair was produced in three sizes, and each size came to be depicted in armory. A field consisting of only