Royal+20 is an exceptional range because of its large size The top layer of 2 mm is available in thre epopular colours in rustic grade The 2 mm top layer can be re sanded but the prefinished lacquerer finish offers a low maintenance wood floor In the rustic grade the knots ensure that the natural wood characteris even more pronounced In addition, there is an integrated cork layer of 2 mm on the back side, which makes the floor quiet to walk on, just like a solid, glued down wooden floor