READ Timberland Premium 6" 8658A Black Waterproof Hiking Boot Womens Size 6.5 M

There is sticky, shiny residue on the bottoms and midsole of the left boot. I am not sure exactly what this is or where it is from. Great used condition otherwise. These shoes have been lightly worn and show only minor signs of wear as pictured. 7.5/10 condition Item number: S51-0 Toe Shape: Round Toe Closure: Lace Up US Shoe Size: 6.5 Occasion: Activewear Heel Height: Flat (Under 1 in) Accents: Logo Vintage: No Personalize: No Department: Women Outsole Material: Rubber Style: Hiking Features: Waterproof Season: All Season Shoe Shaft Style: Mid-Calf Pattern: Solid Character: Boots EU Shoe Size: 38 Lining Material: Leather Color: Black Brand: Timberland Type: Boot Customized: No Heel Style: Block Theme: Going Out Shoe Width: M Insole Material: Leather Upper Material: Nubuck Country/Region of Manufacture: China Performance/Activity: Hiking