Pressboard

An engineered sheet material made by compressing wood fibers, chips, or sawdust with adhesive under high heat and pressure. Pressboard encompasses particleboard and some fiberboard products used in economy cabinet construction for sides, bottoms, shelves, and backs. It is dense, smooth-surfaced, and inexpensive but has poor moisture resistance and limited screw-holding strength compared to plywood or MDF.

Specifying this for a job? Captivating Pro members buy at 20–40% off retail and get cut sheets before rough-in.