These premium visuals enhanced visuals consist of a 20mil wear layer and employ Embossed-in-Register technology. All decors also feature a 4-sided enhanced beveled edge, and a 3mm attached cork underlayment. This cork underlayment provides excellent sound abatement and makes the floor warm under foot. All decors in this collection feature the patented COREtec® technology. Since COREtec is 100% waterproof, COREtec Plus Premium floors can be installed in wet areas and will never swell when exposed to water. COREtec is inert and dimensionally stable; it will not expand or contract under normal conditions. Further, COREtec never needs expansion strips in large rooms. Each COREtec Premium plank has an attached cork underlayment for a quieter, warmer vinyl floor that is naturally resistant to odor causing mold and mildew.