Assertion: pillow's cover | /r/MadeOf | cotton
Facets:
Source sentences:
text: Like the previous pillow, the down is certified by the Responsible Down Standard for ethics and the outer cover is made of cotton.
text: The best toddler pillows have covers made of cotton, cotton-polyester blend, and synthetic fiber.
text: Throw pillows with covers made of cotton or other hardy materials, however, can probably go into the washing machine.