Only the absolutely cheapest stuff is structural cardboard or particle board or MDF. One exception is probably the PAX series of wardrobe/closet system, which i

Only the absolutely cheapest stuff is structural cardboard or particle board or MDF. One exception is probably the PAX series of wardrobe/closet system, which is relatively expensive though it's veneered particle board. The kitchen cabinets are also MDF, but relatively cheap. Definitely cheaper than most competing modular systems (that tend to also be MDF these days). But a lot of their furniture is solid wood.