Old Gringo - Wyoming (Yellow) - Women's: Great care and attention was taken when creating the Wyoming. Premium leather upper. Intricate design is hand tooled in a meticulous time consuming process. Leather lined. Leather outsoles and heel. Tip of heel has added rubber for slip-resistance. Old Gringo(R) boots go through a 130 step handmade production process. Old Gringo(R) also develops and tans its own leathers and textures to make sure the end result is a superior quality product.