Want to Add an Overlay to your Custom made Horse Tack? Choose your Overlay and Add to Cart. No Charge for this Selection. So many choices. 7 different Nylon Overlay Patterns with colors to match your tack. Don't want an Overlay Pattern, although you want to add some contract to your Tack. We can also use most colors of Beta or Bio-Thane as an Overlay too. Please add your selection to the Special Instructions Form.