The Spinalus-3 seat comes in child and a adult version. The child model covers the seat width 28, 33 and 38 cm. The adult seat covers seat width 40, 45, 50 and 55 cm. The child seat can grow with the child for many years. When changing the seat width, all you need to change, is the cushions.

Under the seat, and back cushions there is webbings that can be adjusted for good comfort, and adjustable for varies seat widths. The upper part of the backrest, can be angled forward or backward.

The back has an adjustable dynamic recline which means that the back moves down at the same time as it is angled backwards. It is a sliding function that compensate for change of position and reduce the displacement.

The armrests follow the back and also have a dynamic movement that ensures that they are held parallel when the back is angled. The armrests are available in many different lengths and can be adjusted stepless back and forth.

The seat depth can be adjusted stepless. Due to the construction of the back, the seat depth regulation has no influence on the other geometry in the back.