The three layer hardwood parquet flooring is made up of three layer, the top layer is log sliced veneer of around 1-4mm thickness, the middle layer is made up of soft wood batten of around 9mm thickness, the bottom layer is log sliced veneer of around 2.5mm thickness. The wood fibers of the three layers are interlaced. Also, we have two high density UV polyurethane with Aluminium Oxide coating line, doing all the four layers bottom coating, two layers face coating, one layer reverse coating,so you could always trust on the surface hardness.