Keep your little one safe and snug with the Cybex Sirona S rear-facing car seat. Designed for rear-facing travel up to 4.5 years, it offers up to 50% better protection*, an energy absorbing shell, and Linear Side impact Protection for 25% more side-impact safety**.
One-handed 360° rotation, rigid crotch pad and magnetic holder for easy and simple onboarding. XXL UPF50+*** sun canopy, adjustable GrowTech fit, and chic leather-look trim combine safety and style.
Rear-facing safety
Meet rear-facing travel at its very best; keep your little one safe and snug for the first 4.5 years with the Sirona S car seat. Its shell acts like a protective shield, cleverly distributing impact forces and holding your child close. With rear-facing mandatory until 15 months, it provides up to 50%* better protection until they turn 4.5.
Grows up to 4.5 years
Cybex GrowTech is specially designed to ensure that the seat grows and adapts with your child. The standard comfort inlay provides added support, while the newborn inlay, available as an accessory, enables use from birth up to approximately 4.5 years (40–105 cm). AGR-certified for enhanced ergonomics, it features an adjustable headrest, M-position, and 40% more recline range in both rear-facing and more upright forward-facing positions**. Safe, comfortable, and designed to adapt seamlessly as your child grows.
360° rotation
Smooth one-handed 360° rotation eases the strain on parents’ backs when placing your child in or taking them out of the car from the side. The rigid crotch pad provides easy and simple onboarding - quick and ergonomic for both parent and baby.
25% more side-impact protection
Advanced Linear Side-Impact Protection is part of a three-tier safety system that cuts impact forces by up to 25%*** by channelling energy into the car seat’s energy-absorbing shell and headrest. The integrated L.S.P folds out with a simple push during setup and tucks neatly away when space is limited.
Optimal breathability
All-round air ventilation supports to keep the child cool and dry year-round. Innovative 3D mesh Style fabric that self-regulates moisture absorption, boosts airflow up to 6× vs. conventional materials and ventilated hard parts guarantee optimal breathability and comfort. For extra peace of mind, Cybex offers SensorSafe, a child-in-car alert system that also monitors the car’s interior with an app that sends smartphone notifications.
Modular system - three seats, one base
If you already have a Cloud S infant car seat, you can use the same Base S to switch seamlessly to the Sirona S, keeping your child rear-facing up to approximately 4.5 years. Alternatively, choose the Anoris S Airbag for forward-facing travel with airbag technology. One modular system gives you the freedom to choose the best solution for you.
Features:
- Rear-facing travel for enhanced safety, offering up to 50% better protection until approximately 4.5 years compared with forward-facing travel
- Suitable from birth to approximately 4.5 years (40–105 cm) with the optional newborn inlay, adjustable headrest and ergonomic design
- Three removable inlays provide adaptable support as your child grows, with the included Comfort inlay suitable up to 85 cm
- AGR-certified ergonomics with an adjustable headrest, natural M-position and 40% more recline range in rear-facing and forward-facing positions
- 360° one-handed rotation for easy access when placing your child in or taking them out of the car
- Advanced Linear Side-Impact Protection (L.S.P.) designed to reduce impact forces by up to 25%, with a fold-out system for added convenience
- Magnetic belt holders keep harness buckles neatly out of the way for easier, hassle-free boarding
- All-round ventilation, breathable 3D mesh fabrics and ventilated seat components help keep your child cool and comfortable
- Compatible with SensorSafe technology, which provides child-in-car alerts and smartphone notifications (availability may vary)
- Integrated XXL sun canopy with UPF50+ protection and a breathable mesh window helps shield your child from sunlight and improve airflow
- Materials screened for harmful substances, including heavy metals, phthalates and flame retardants
- Part of the modular system, compatible with Base S and designed to work alongside the Cloud S infant carrier and Anoris S Airbag car seat
Specifications:
- Suitable from approx. 3 months up to approx. 4.5 years (from birth with newborn inlay as accessory)
- Child height range: 61cm - 105cm (from 40-60cm with newborn inlay)
- Complies with i-Size regulation UN R129/04
- Dimensions: L 56cm / W 45cm / H 55cm
- Weight: 7.3kg
- Fabric covers machine washable at 30°
**Compared to predecessor
***Confirmed by ADAC in its article dated 10 June 2026; referring to car seats of this type
****Except for mesh parts
Cybex Base S
The Cybex Base S is the only car seat base you’ll ever need. Designed for busy families, this modular base gives you full flexibility: rear- and forward-facing travel, compatibility with three different seats, and use from newborn through age seven.
It’s built to last, straightforward to install, and makes every car trip easier. Switch directions and use the same trusted foundation for rear-facing safety in the early years and forward-facing comfort as your child grows. Easily rotate the seat toward the car door for fast, stress-free loading and off-boarding, especially when you’re juggling a baby and bags.
Make car travel easier, safer, and more flexible. One durable base. Countless journeys.
This base is secured to your car with its ISOFIX connectors and load leg which offer both safety and stability, and can also be installed by using the cars seat belt to attach the seat to the base in vehicles without ISOFIX connectors.
Features:
- FREEDOM OF CHOICE
- One base with two directions and up to 7 years of flexibility
- The Platinum S-Line Modular System grows with your family from birth to approximately 7 years
- Compatible with the Cloud S infant car seat, Sirona S rear-facing car seat and Anoris S Airbag forward-facing car seat
- Enjoy exceptional safety, seamless compatibility and long-lasting value with the same Base S
- 360° ROTATION
- Smooth, single-hand rotation for easier boarding and off-boarding
- 180° rotation for Cloud S and Anoris S Airbag, and 360° rotation for Sirona S
- One-handed operation and convenient side-entry make loading your child easier
- Helps reduce awkward lifting and makes it easier to position your child and secure the harness correctly
- LED SAFETY INDICATORS
- Onboard safety assistant helps guide correct installation and secure positioning
- LED indicators show the status of the ISOFIX, load leg, impact shield and battery
- Clear status indicators help parents check the setup at a glance for greater confidence before every journey
- MADE TO LAST – NEWBORN TO 7 YEARS
- Designed to support your child from birth until approximately 7 years of age
- Switch between the Cloud S infant seat, forward-facing Anoris S Airbag and rear-facing Sirona S
- Durable materials and smart engineering deliver lasting strength for everyday use
- A long-lasting car seat solution designed for convenience, ease of use and growing families
- ISOFIX EASY INSTALLATION
- ISOFIX anchors and a height-adjustable load leg provide a rigid, stable connection
- Designed to help reduce car seat movement in a crash.
- Colour-coded ISOFIX release buttons and clear indicators guide installation
- Fast, straightforward setup helps parents secure the car seat with confidence
Specifications:
- Compatible with Cloud S, Anoris S Airbag and Sirona S
- Complies with i-Size regulation UN R129/04
- Dimensions: L 61cm / W 40.5cm / H 22cm
- Weight: 6.8 kg (with Cloud S adaptor)
Videos Hide Videos Show Videos
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CYBEX Sirona S Car Seat Tutorial
Discover how to set up and get the most out of your rear-facin...
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How to Rotate the Seat I Sirona S Car Seat I CYBEX
Find out how quick and easy it is to get your child on board u...
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How to Adjust the Headrest I Sirona S Car Seat I CYBEX
See how easy it is to keep your child safe, secure and sitting...
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How to Switch to Forward - Facing I Sirona S Car Seat I CYBEX
Discover how to switch the Sirona S forward-facing using a sea...
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How to Remove the Seat I Sirona S Car Seat I CYBEX
See how simple it is to remove your Sirona S car seat in a few...
Cybex products are covered under a manufacturer’s warranty period of 2 years. This covers you for any manufacturing faults that may occur during this period. Please note: Cybex warranty begins on the date of purchase.
Mainland UK Delivery Options
| Delivery Option | Delivery Time | Cost |
|---|---|---|
|
Express Delivery |
Order before 4pm (Mon - Fri) to receive your order the following working day.* Available on all items, except furniture and larger/heavier items. Please allow an extra day for Bank Holidays. |
Orders over £49.99 are FREE Orders under £49.99 are £6.95 |
|
Standard Delivery |
2-3 Working Days |
£3.95 (Only available on orders under £49.99) |
|
Direct Delivery |
Where a product states direct delivery, this will be fulfilled by the supplier directly from their warehouse by their nominated carrier. You will be contacted to arrange delivery. |
*Your order will only be available for immediate despatch if all your items are in stock at time of order.
If you have multiple items in your order and one of the items is currently out of stock, your order will be dispatched to you once all items are in stock. However, if you wish to receive the in-stock items now and the out-of-stock items when they become available at a later date, please contact our Sales Team by phone or email and express that you wish to receive your order as separate deliveries.
We may use a third-party warehouse to fulfil some or all of your order. Should your order need to be despatched from multiple warehouses, we will endeavour to arrange that your items arrive with you on the same day. Please note: In this instance you will receive multiple tracking numbers.
To ensure your order reaches you safely and as quickly as possible, we may use a variety of premium delivery carriers depending on the size, weight, shape and requirements of your order. While DPD is our usual delivery partner for many orders, certain products – particularly larger, heavier or unusually shaped items – may be better suited to an alternative carrier such as DHL or another specialist delivery service.
The delivery service used for your order is selected based on the most appropriate option available for your items and delivery address. There is no additional charge if we use an alternative carrier.
We will keep you up to date when your order is on its way and the carrier will send you a text/email on the day of delivery so you know when to expect your order.
Delivery services are subject to availability and stock availability. All delivery dates are estimates only and not guaranteed.
| The following postcodes are sent on a standard 2-3 working day delivery: | |||||
|---|---|---|---|---|---|
| IV(All) | KW(ALL) | PA20-PA78 | TR21-25 | ZE(ALL) | |
| AB31-AB35 | AB41-AB54 | AB36-AB38 | AB55-AB56 | KA27-28 | |
| HS1-9 | G83 | PH15-PH29 | PH30-PH31 | PH32-PH33 | |
| PH34-PH44 | PH45-PH48 | PH49-PH50 | |||
Unfortunately, we are unable to deliver to BFPO numbers.
UK Highlands, Islands and Northern Ireland Delivery Options (sent on a standard 2-3 working day delivery)
All UK Highlands, Islands and Northern Ireland Orders are charged at a flat rate of £11.95 (sent with DPD)
| The following postcodes are UK Islands and Ireland: | ||||
|---|---|---|---|---|
| BT(All) | EI(All) | IM(All) | ||
Channel Isles – all orders sent at a flat rate of £30.00
Alternative Delivery Carriers
To ensure your order reaches you safely and as quickly as possible, we may use a variety of premium delivery carriers depending on the size, weight, shape and requirements of your order.
While DPD is our usual delivery partner for many orders, certain products – particularly larger, heavier or unusually shaped items – may be better suited to an alternative carrier such as DHL or another specialist delivery service.
The delivery service used for your order is selected based on the most appropriate option available for your items and delivery address. There is no additional charge if we use an alternative carrier.
You will receive tracking and delivery notifications from the carrier handling your order, so you can follow its progress and know when to expect your delivery.
DPD Predict Service
Never miss a parcel delivery – for orders sent via DPD you will be notified by text and email on the day of despatch and again on the day of delivery offering a one hour time-slot. If you’re unavailable during this time you have the option of re-arranging your delivery date, or for your delivery to be left with a neighbour.
Download the DPD Predict app and nominate a specific neighbour, your chosen safe place or collect the parcel from your local DPD pickup shop. Please note that a signature is required for all DPD deliveries.
Direct Deliveries from Supplier
Where a product states direct delivery, this will be fulfilled by the supplier directly from their warehouse. Each supplier has a different delivery service. Please contact our sales team on [email protected] for any queries regarding direct deliveries.
Provided lead times are best estimates at the time as provided by our suppliers and are measured against a standard working week and do not factor in national holidays.
Please note that we can only deliver furniture to mainland UK, excluding the Highlands of Scotland, Islands and Ireland. We are unable to accept orders for International delivery.
Panther
Some of our heavier/bulkier products are fulfilled through one of our Logistics partners - CuddleCo/Kiss Logistics via a Panther Carrier Service. You will receive delivery communication as “CuddleCo”, your information will only be used for the fulfilment of the order.
Parcel Forwarding Service
For delivery outside the UK, a number of our customers have used forward2me, the top-rated Parcel Forwarding Service. forward2me offers a choice of premium courier services including DHL, UPS, DPD, TNT & Whistl to forward parcels to over 200 countries at very competitive prices.
Other services include a Combine and Repack Service where you can make lots of purchases and ship as one to save on international shipping costs. For more information including independent customer reviews please visit the forward2me website or watch the how it works video.
Posting and Packaging
Here at Winstanleys Pramworld we operate a recycling policy and frequently re-use original packaging to ship brands or products that are different to those that appear on the original box. If you receive a package that has a different brand or product on the box other than you are expecting, please open the box to determine if the product is incorrect. Additionally, we will occasionally pack smaller items in with larger items - please double check the contents of the box. Opening your order does not affect any returns.
Frequently Asked Questions
What if one of the items in my order is out of stock?
If you have multiple items in your order and one of the items is currently out of stock, your order will be dispatched to you once all items are in stock. However, if you wish to receive the in-stock items now and the out-of-stock items when they become available at a later date, please contact our Sales Team by phone or email and express that you wish to receive your order as separate deliveries.
If an item is marked as out of stock what does this mean?
When a product is marked as out of stock on our website, it means it is temporarily out of stock and cannot be dispatched right away but is on order with our supplier. Upon receiving your order we will contact you within 24 hours to advise an estimated delivery date.
Can I change my designated delivery day?
Yes. If you wish to select an alternative delivery day please give our Sales Team a call before 4.00pm on the day your order was placed. Once our courier has collected your parcel(s) from us, you will receive an email and/or SMS text message containing a link to the relevant carrier's website, where available, that will direct you to the tracking information for your order. This will enable you to check its progress, location or, where supported by the carrier, change your delivery day.
Do you deliver internationally?
Sorry, Winstanleys Pramworld will no longer ship items internationally. However, a number of our customers use parcel forwarding services such as forward2me.