Osann One 360 SL R129 i-Size Car Seat – Black

The Osann One 360 Black R129 i-Size Car Seat is a long-lasting, 360° rotating car seat designed to keep your child safe, comfortable and supported from birth to approximately 12 years old. Suitable from 40–150cm, it provides one practical seat for the key stages of your child’s car travel: newborn, toddler, child and high-back booster.

Finished in classic Black, this versatile car seat suits every car interior and is an easy choice for busy family life. Its soft, deeply padded seat cover and especially cushioned headrest help keep children comfortable on both short journeys and longer family trips.

The Osann One 360 SL is approved to the latest ECE R129 i-Size safety standard. It has also undergone additional testing to meet ADAC-level standards, providing further reassurance when choosing a car seat that will be used for many years. Osann combines practical safety features with excellent value, without compromising on the essentials that matter to parents.

Easy 360° Rotation

The Osann One 360 Black R129 i-Size Car Seat rotates through 360°, allowing you to turn your child towards the car door when getting them in or out. This is particularly useful during the baby and toddler stages, making it easier to fasten the harness without bending awkwardly into the car.

The Easy Adjust System allows you to rotate the seat and change its position with one hand. Magnetic holders keep the shoulder straps safely out of the way while you place your child in the seat, helping to make everyday journeys smoother and quicker.

Extended Rear-Facing Travel

The Osann One 360 SL can be used rear-facing from birth until your child reaches 105cm, with a maximum child weight of 18kg. This is approximately up to four years old. Rear-facing travel offers important support for a young child’s head, neck and spine and is the safest way for younger children to travel.

There are two rear-facing recline positions to support your child as they grow:

• Rear-facing position R1: 40–75cm
• Rear-facing position R2: 76–105cm

Your child may travel forward-facing from 76cm and at least 15 months of age. However, we recommend keeping them rear-facing for as long as possible, ideally until 105cm.

Grows With Your Child

The Osann One 360 Black R129 i-Size Car Seat adapts through every important stage. The 14-position adjustable headrest gives tailored support as your child grows, and the five-point harness automatically moves with the headrest to help maintain a secure fit.

For newborns and smaller babies, the removable comfort insert and additional head-support cushion provide added support. These can be removed as your child becomes bigger, creating more room while maintaining comfort.

Once your child reaches 100cm, the seat easily converts to high-back booster mode for use up to 150cm. The five-point harness stores neatly within the seat, so there is no need to remove it or keep separate parts. Your child then uses the vehicle’s three-point seat belt. A crotch strap helps guide the vehicle seat belt into the correct position across your child.

Secure Isofix Installation

The Osann One 360 Black R129 i-Size Car Seat installs using Isofix connectors and a support leg for a stable, secure fit. The Isofix connectors are individually adjustable to help achieve correct installation in your vehicle, while the support leg adds further stability.

An additional slide protector offers increased side-impact protection. The seat has four forward-facing sitting and reclining positions, available up to 125cm, helping provide a comfortable travel position as your child grows.

Always follow the supplied instruction manual carefully and check your vehicle handbook to confirm that the car seat is suitable for your car.

One Practical Seat for Years of Journeys

The Osann One 360 SL is an excellent choice for parents looking for a safe, practical car seat that lasts. It offers the convenience of 360° rotation, extended rear-facing safety, Isofix installation and high-back booster use in one smart design.

Explore our full car-seat collection for more travel options, or see our car-seat accessories for helpful everyday extras.

For independent child car-seat safety advice, see the Road Safety Authority’s guidance.