What causes the green color in Horween Reverse Shell Black Cordovan leather? The smooth side of Shell Cordovan is dyed black, but when reversed, the flesh side reveals natural green hues picked up from Horween’s hot-water dye vats. Every piece absorbs residue differently, creating one-of-a-kind color variation. The Horween stamp is also only visible on the reversed side, giving each pair of Cordovan SMUGS its own signature look. Rose Anvil × Goral Cordovan SMUGS drop 10.23.25 — only 50 pairs ava