Ok Baby Orion bicycle seat for bicycles that mounts on the head tube of frames with a round section with a diameter between 32 and 52 mm. The head tube must have a height between 1 and 14.5 cm. Orion is suitable for transporting children from approximately 9 months of age and/or a minimum weight of 9 kg, up to a maximum of 15 kg. The Orion seat must be mounted between the handlebars and the rider on the bicycle's head tube.

The child must be able to sit up unaided for at least the entire duration of the bike ride. The seat material (polypropylene) loses some of its mechanical properties through the aging process if exposed for a long period to environmental influences (sun, rain, ice, etc.). In case of normal use and exposure to environmental influences, it is recommended to replace the seat after three years.