PLYWOOD
Plywood is an engineered wood product made from wood chips peeled from logs while rotating them along their horizontal axis. The sheets of veneer obtained from this process are cut to the desired dimensions, dried, patched, glued together, and then baked at high heat in a press to form panels. The problem arises with expansion gaps that are found within sheets. Plywood, like all wood products, will expand or shrink with changes in moisture levels. This expansion and contraction is the number one cause of delamination, an unsightly problem that is not easily fixed.
Medium-density fiberboard - MDF
MDF is an engineered wood product formed with wood fibers obtained from breaking down hardwood and softwood. The wood fibers are glued together using wax and resin adhesive, then made into panels by applying high temperature and pressure. Unlike plywood, MDF panels are a solid composition and will not warp or crack. MDF expands and contracts when there are fluctuations in temperature and humidity but because of its structure it moves as a unit. Even with extreme changes in humidity and temperature, you won't have to worry about delamination and damage to your doors.
Face frame, cabinet doors, and top casing are solid hardwood.