buffalo robe

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The dressed skin of the North American bison, used as a lap robe, cape, or blanket.

from The Century Dictionary.

• noun The skin of the bison of North America, prepared with the hair on, and used as a carriage-rug and in other ways for protection from the cold.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun US (historical) A cured bison hide, with the hair left on, used as a blanket or wrap.