You can add a hhe hardwearing commercial grade upholstered seat or plain wooden seat make them ideal for heavy use. You can also build seating almost from scratch by height, swivel functions, seating options, and leg styles. These wooden barstools, counter stools and chairs have solid beech frames manufactured in Europe are available in as unfinished bar stools - or unfinished wooden chairs. Many Adirondack chairs are made from plastic to keep up with modern practices. With their classic design, Adirondack chairs are popular for outdoor furniture.