Ikea can sell affordable furniture due mainly to what is used to make their products: a combination of fiberboard, particleboard, and other materials like steel and plastic.
Most cabinets are made from hardwood, but they’re typically more expensive. What makes Ikea's cabinets inexpensive yet durable is their use of both fiberboard and particleboard.
Ikea’s cabinets may not be high-end, but the company’s use of polypropylene plastic to coat the particleboard makes them more resistant to moisture and general wear