Feather Cap

The Feather Cap is a supposed cap in Super Mario 64. It functions the same as Super Mario World's cape power-up.

Feather Cap in the Sky-High Islands
Feather Cap in the Sky-High Islands is the cap switch course of the Feather Cap. It is found by flying into the sky using the Wing Cap or Feather Cap. It is a large series of islands floating in the sky on clouds. Upon reaching the end, there is a white Cap Switch. There is also a red coin star.