Opal HD

Maxi-cosi Opal HD Helping babies with hip dysplasia
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  • Plenty of space for little splinted legs
  • Height and width adjustability

Product description

Standard car seats do not provide the flexibility, comfort and safety that a baby with hip dysplasia needs – but the Opal HD does.


Install the Maxi-Cosi Opal HD in your car, using your car’s seat belt. This will give you great flexibility as not all cars have ISOFIX connectors; meaning it’s easy to switch the Opal HD from car to car.


At Maxi-Cosi we have carried over 50 million babies home from the hospital. For us, your child’s safety is Maxi-Cosi’s top priority. That’s why we have designed the Opal HD for babies with hip dysplasia, to make sure they travel safely from birth until age 4.

Your little one can benefit from rear-facing travel with our Opal HD car seat up until they’re around 15 months old, which is recommended for improved head and neck protection. In addition, Opal HD offers the following features: a headrest for maximum protection from side impacts; a 5-point integral safety harness ensuring your child is securely restrained; intuitive belt routing that makes it easy for you to install the car seat; and anti-slip shoulder pads assuring high restraint performance in case of a frontal impact.

Maxi-Cosi Opal HD for babies with hip dysplasia

Specially designed with the support from paediatricians, Maxi-Cosi Opal HD provides extra back support and space for a little one’s legs, which is vital for children with hip dysplasia. Your child can enjoy optimal comfort during every trip as our Opal HD adjusts from sitting to sleeping positions. Suitable for two age groups, Opal HD enables rear-facing travel until a child is around 15 months old, offering your baby the best protection. Then the Opal HD can easily be turned face forward, by using a simple switching device.

The Maxi Cosi Opal HD isn’t for sale. Instead, our Hip Safety Service will rent you the car seat while your child is receiving treatment.

Why choose me

Long-lasting car seat, growing with your baby from birth up to age 4
Easy rotative switching system, from rear to forward-facing, without reinstalling the full belt routing
Simultaneous safety harness & headrest adjustment (6 positions) to fit the growing child perfectly
One-hand harness adjuster
Convenient belt hooks keeps the harness open when securing a child
Measuring height indicator: helps to know when it's time to switch from rear to forward-facing
Machine washable cover at 30°

Plenty of space for little splinted legs and extra back support when lying flat, which is vital for children with hip dysplasia
High-comfort seat with height and width adjustment to ensure a perfect fit for both babies and toddlers
Extra padded wide seat
6 position headrest adjustment: always perfect fit for the growing child
Baby support pillow to offer best comfort for the baby
Optimal reclining position in rear-facing mode
5 reclining positions in forward facing mode to provide maximum traveling comfort
Shoulder and crotch pads for comfort

Rear-facing travel: Safer rear-facing travel, until approx. 15 months of age, for improved head and neck protection
High headrest offering side impact protection
Belt tensioner system for an extra strong and secure installation in both directions
5-point integral safety harness to ensure a child’s high safety restraint
Intuitive belt routing to easily install Opal using 3-point seat belt
Anti-slip shoulder pads for high restraint performance in case of a frontal impact
The belts are not the same length. Why is this?
Uneven belts may be caused by the incorrect guiding of the harness system. Check at the back of the car seat that the belts are not twisted and that the pull belt (that runs forward at the bottom of the shell) is in the middle of the system. Also check that the belt can move easily to and fro through the shoulder openings. For smooth movement, the belt buckle should be flapped forward completely. This belt buckle operates by releasing the belt tensioner. If the problem continues after you have checked this, consult your retailer.
How long can I use a Maxi-Cosi car seat without a break?
This is subject to a lot of misunderstanding. This is generally said and written out of concern for babies and, in a nutshell, boils down to the fact that a baby car seat should not be used excessively. Children should not lie in a fixed position for too long unnecessarily. They must be given the opportunity to develop their motor system and arm, back and neck muscles. As manufacturers of the first car seat for babies in Europe, we have of course been including this in our instructions for many years. So do not place a baby in his or her seat for the entire day for reasons of convenience, but give him or her the opportunity to develop. This also applies to front pack carriers and all other products in which a baby sits, hangs or lies in a stationary position. However, this will not be a problem at all if you need to make a relatively long car journey or holiday trip once in a while. Our advice is as follows: stop once every 2 hours. After all, the baby must also eat and be cleaned on a regular basis.
I can still pull out my car seat belt, which means the car seat can move around. Is this safe?
In the event of a sudden stop or accident, the car seat belt will block automatically and the child car seat will be unmovable as a result. The Axiss and Tobi are equipped with a tensioner that makes it possible to tighten the car seat belt for a tighter fit and secure the car seat more firmly.
Why do babies and young toddlers have to travel in a rearward facing position
Babies have a large and relatively heavy head compared to the rest of their body. In addition, their neck muscles are not yet fully developed. If the baby is travelling in a forward-facing position, his or her head will be thrown forward in the event of a head-on collision. This can cause serious neck injury and may even be fatal. By placing the baby in a rear-facing position, the forces exerted during the crash will be distributed across the baby’s entire back. It is therefore safer to travel rearward facing for babies until at least 13kg (approximately 15/18 months).
My child climbs out of the safety harness, what can I do?
The same principle applies to all car seats and means that your child cannot create extra space if there is no extra space to begin with. Some children have shown us that, with only a minimum of slack in the belt system, they can get a hand between the buckle and their stomach and then, by moving it towards their head, they can get an elbow under the belts – but this requires a very flexible shoulder. These children display a tremendous desire to free themselves from their car seat. Child safety in the car and freedom of movement are not compatible in principle. To transport a child not only safely but also comfortably, a slight amount of slack in the belt system is needed. If the belt is pulled extremely tightly and the child is sitting calmly in the car seat, experience has taught us that all car seats are the same when it comes to 'climbing out of the car seat'. We see a similar pattern in children ages 1-4 years in car seats of various types and from various manufacturers. The belt system is a closed system that keeps the child in the same position continuously - during normal car trips as well as during a sudden stop or accident. This system is closed by securing the child when tightening the belts. If this is done properly, the belts cannot be loosened during use (if this does happen, we ask that you contact our Customer Care team through the contact form on our website)
What should I do if my child opens the buckle on his or her harness belt?
In this case, we recommend, as do all international safety experts, that you stop immediately in a safe place, fasten the buckle once more and tell the child he/she should not open it and the reason for this. It is always a possibility that an inventive, handy or strong child will open the buckle. If the force required to open the buckle were to be considerably increased to make it impossible for the child to open it himself, this would be contrary to the legal safety standards. The position of the buckle, the colour of the button, and the operating or opening force are all laid down in European standards. In the case of an accident, someone providing assistance without any knowledge of car seats must be able to see immediately how to release the child from a car seat in an emergency.



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