Conversation so far:
how many cm is a queen size blanket
Typical sizes in the United States for queen comforters are 221 cm squared.
how many inches is a queen size blanket
A queen comforter is 87 inches squared.
what are comforters made out of
Comforters are filled with layers of natural material such as down feathers, wool, or silk; alternatively, polyester batting is used.

Question: what about the outside
Self-contained rewrite: what are the outside of comforters made out of