Teddy

A Teddy Guinea pig has a very dense and springy coat, with hairs that stand up. The hair typically grows to a moderate length and generally makes this breed resemble a soft toy more than any other. Another unique feature of the Teddies in the USA is the relatively long hair coating their bellies. In the UK, teddies must have short coats, growing slightly forward to a "cap" on the forehead. Young Teddies sometimes look similar to the Rex, but the Rex's coat is usually much harsher and bristled. There is sometimes confusion between the US teddy and the so-called Swiss teddy, but in the UK, the Swiss teddy has been renamed simply the Swiss. The Swiss is a longer coated animal with a coat reaching between 6 and 9 cm in an adult animal.

http://en.wikipedia.org/wiki/List_of_guinea_pig_breeds