Although their coat appears white, both their guard hairs and underfur are actually translucent.

它们皮毛看起来是白色，但它们外粗毛和下绒毛实际上都是半透明。

About 70% of it is a fine underfur  that acts similar to down on birds.

其中大约 70% 是一种细绒毛，其作用类似于鸟类身上绒毛。

The top layer repels water, and the underfur keeps their bodies toasty in the cold waters they call home.

水，底毛让它们身体在它们称之为家冷水中保持温暖。

Their long coats come in bright  orange, reddish brown, and yellowish Their underfur is a light grey, their tails are  long, and their stomachs are large and swollen.

它们长毛有亮橙色、红棕色和淡黄色，底毛是浅灰色，尾巴很长，肚子又大又肿。