PREMIUM QUALITY: Assembled by water proof fiberboard and rust - proof hardware fittings. Finished with water proof surface coating & medium density fiberboard (MDF) - a dense, warp-resistant engineered wood. High-quality material withstands the humidity of the bathroom. Even in the damp bathroom can be durable for long-term use, allowing the countertop to bid farewell to dirt and clutter. A reasonable and orderly storage design will maximize your vertical storage area.