vair

noun2

1. •
   A type of fur from a squirrel with a grey back and white belly, much used on garments in the Middle Ages.

   • Bran wore grey breeches and white doublet, his sleeves and collar trimmed with vair. — 1999
2. •
   An heraldic fur formed by a regular tessellation of bell shapes in two colours, (for example in the image, blue and white).