selkänoja

Selkänoja, meaning backrest in Finnish, is the part of a chair, sofa, or bench that provides support to the sitter's back. It is typically attached to the frame behind the seat and may be padded, upholstered, or carved from solid material. The primary function is to support the spine and upper body, contributing to posture and comfort during seated use. In addition to comfort, backrests influence ergonomics, aesthetics, and seating duration.

Backrests vary greatly in height, contour, and adjustability. Fixed backrests offer a single form, while contoured backrests follow the natural curve of the spine and may include lumbar support. Adjustable backrests allow changes in height, angle, or tilt to suit different users or tasks. Materials range from wood, metal, and plastic to foam padding and fabric or leather upholstery. Some backrests are thin and minimalist, others are heavily padded for comfort or sound-dampening.

Ergonomic considerations include providing adequate lumbar support, maintaining an appropriate angle between the back and the seat, and leaving space for the shoulders. The most common office backrest height is to support the mid to upper back, while dining chairs use shorter backrests for a lighter silhouette.

In construction, the backrest is usually connected to the chair frame by joints or brackets and can be integrated as a single piece or as a separate panel. Care and maintenance depend on materials; fabric and leather upholstery require cleaning, while wooden or metal backrests may need occasional polishing or corrosion protection.

Selkänoja is a standard element of modern seating, with design choices balancing comfort, aesthetics, and intended use.