There are multiple kinds of office chairs designed to suit different needs. The most basic is the task chair, which typically does not offer lumbar support or a headrest. These chairs generally cannot be sat in for more than a couple hours at a time without becoming uncomfortable, though they often offer more room to move than higher-end chairs.
Mid-back chairs offer fuller back support, and with the right ergonomic design, can be sat in for four hours at a time or longer. High-end chairs in this category, such as the Herman Miller Aeron, are comfortable for long periods.
Executive or full-back chairs offer full back and head support. Many executive chairs are designed to be sat in for eight or more hours at a time. These are typically the most expensive office chairs.
Over time office chairs wear out and break.[5] Seat cushions may lose their softness or become discolored and are not repairable.[5] Casters can stop spinning and scrape or carve grooves into the floor.[5] These are a standard part and can be re-lubricated[6] or replaced inexpensively.[7] The gas cylinder used for height adjustment may leak and provide no support.[5] This can be repaired using a replacement gas cylinder or by providing support through other means.[8] The chair armrests may break or come loose; these can be repaired or replaced as well.[6]
Types classified by materials
Wooden furniture
Bamboo furniture
Wicker or rattan furniture
Metal furniture
Plastic furniture, also known as acrylic furniture
Glass furniture
Concrete furniture
Bombay furniture, also known as blackwood furniture