When sourcing bathroom vanities, the material of the cabinet body is the most critical factor due to high humidity. Solid wood (such as Oak or Rubberwood) offers the highest durability and premium feel, but must be properly treated with waterproof coatings. For mid-range projects, Plywood with a melamine or veneer finish is highly recommended as it is more stable than MDF in moist environments. Ensure the countertop is made of Sintered Stone, Quartz, or Marble, as these materials provide excellent scratch resistance and low water absorption rates (below 0.05%).