Bedroom furniture, sometimes called a bedroom set or bedroom suite consists of a group of furniture in a bedroom or sleeping quarters. Pieces of furniture referred to as bedroom furniture usually include: beds, wardrobes, dressers, chests, nightstands, armoires, vanities, trunks, and mirrors. There are also many variations of these pieces as furniture styles have changed through time and as individual manufacturers have put their own spin on them. Bedroom furniture is predominantly made of wood, but many bed frames are made of various metals as well. One of the common traits of quality bedroom furniture is drawers fashioned together using a method called dovetailing or English dovetailing. This method involves the interlocking of two pieces of wood, usually at a right angle. More modern methods make use of materials such as MDF (medium density fibreboard) finished with a covering that mimics exotic and rare timbers. Man made materials such as these are often described as "The saviours of the rain forests" as they satisfy a need for quality and beauty without using the planets valuable resources.