Oprah Winfrey is one of the most influential people in the world, so it's no surprise that people are interested in what pillow she uses. Oprah actually uses two different pillows on her bed - a down pillow for her head and a body pillow for her knees.
The down pillow that Oprah uses is from the company Pacific Coast Feather. It's filled with feathers and has a cotton cover. The body pillow that Oprah uses is from Cuddledown and is filled with Downlite Extraordinaire feathers. This pillow is also covered in 100% cotton.
Both of these pillows are very high quality and offer a lot of support and comfort. They're also both machine washable, which is important for someone who sleeps as much as Oprah does!