Traditionally the coat is grown out very long and is parted down the middle of the back, but 'must never impede movement. 'From the back of the neck to the base of the tail, the coat should be a dark grey to a black colour, and the hair on the tail should be a darker black. The fine, straight, silky coat is considered hypoallergenic. The ideal Yorkshire Terrier character or 'personality' is described with a 'carriage very upright feisty' and 'conveying an important air'.