Ok Baby Orion bicycle seat, which mounts on the head tube of frames with a round section between 32 and 52 mm in diameter. The head tube must be between 1 and 14.5 cm high. Orion is suitable for carrying children aged at least 9 months and/or weighing at least 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 independently for at least the entire duration of the bicycle ride. The seat material (polypropylene) loses some of its mechanical properties through the aging process if exposed for long periods 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.