A stitched-on strip of leather around the outside of the top of the boot or shoe. Sometimes the collor is padded which provides for a more secure heel fit and helps prevent debris from entering the shoe. Found on https://www.encyclo.co.uk/local/23292
1) Mountain in Peru 
A stitched-on strip of leather around the outside of the top of the boot or shoe. Sometimes the collor is padded which provides for a more secure heel fit and helps prevent debris from entering the shoe.