by Bruce Flooring, this floor shown is engineered hardwood.
Engineered wood is real wood, but instead of one solid piece
it consists of three to 10 thin layers of wood, called plies,
that are assembled and glued in a cross-ply construction.
top layer of wood can range from 1/16" to 1/6" thick.
Overall board thickness ranges from 1/4" to 3/4".
Due to its multi-ply structure, engineered wood is much more
stable than solid wood and is less susceptible to shrinking
and expanding with changes in temperatures and humidity
Bruce- Gunstock Oak