I always heard them referred to as a "Whisker Cloth", but here is a reference to them as a "Whisker Guard":
http://books.google.com/books?id=fiI...0cloth&f=false
Edited to add: scroll down to page 10 for the text on the Whisker Guard :D
Here is a Quilters Newsletter with info, directions and a pic:
http://www.quiltersnewsletter.com/we...feature373.pdf