London Fog Milly Duck Boots Size 10

Nice preowned condition London Fog Milly Duck Boots Size 10 Features: Water Resistant Shaft Circumference: 15 Inches Boot Shaft Height: 9 Inches Shoe Heel Height: 1/2 Inch Upper Outer Surf Area: 70% Synthetic, 30% Textile Shoe Lining Material: Faux Fur Sole Outer Surf Area: 100% Rubber Shoe Fasten: Lace-Up Toe Type: Round Toe That is not mud on the bottom of the sole It is some type of material that is on the boot that the manufacture put there.