MDF stands for Medium Density Fiberboard. Typically you have the option of MDF cabinet doors versus Solid Wood Kitchen cabinet doors. There are pros and cons to both, but overall MDF doors are less expensive than wood. Some people pick MDF because it is less expensive, but also because it is resilient to buckling and swelling with changes in humidity and heat. This makes MDF boards ideal for cabinetry in high humidity rooms, such as bathrooms. Another advantage of MDF materials is that sometimes real wood is not available, meanwhile, MDF is typically available in many shapes, sizes and styles, so you’ll never have to wait.