Is a baby penguins fur called down?

A penguin skin has two layers: a fat layer and a feather layer. The fat layer (also calledblubber) is several centimeters thick and helps penguins in staying warm, even in extreme conditions.

The feather layer is the top layer, and also helps in keeping a penguin warm. It is wind- and waterproof thanks to several things. First of all, a penguin feather consists of two parts: a downy and a stiff part.