Being a contractor, I am quite familiar with building materials. This is advertised as being constructed with MDF, but in actual fact it is particle board. Particle board is less than ideal for a bathroom vanity as it is quick to absorb water and swell. MDF is a medium density fiber board which resists water a little better than particle board. It is also a higher quality. Wayfair made this right for me and my customer by giving us a refund. Buyer beware the materials are not as advertised. But, all things aside it is constructed well and shouldn't be an issue for regular residential use.