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Description
cybex sirona car seat weight CYBEX Sirona T i-Size 360° Rotating Car SeatCYBEX Sirona T i Size 360 Rotating Toddler Car Seat Extended Rear Facing Convertible Car Seat Birth to 105cm (Approx. 4 Years) Experience the ultimate in safety and convenience with the CYBEX Sirona T i Size 360 Rotating Toddler Car Seat. This innovative convertible car seat combines extended rear facing protection with revolutionary 360 rotation, making every journey comfortable for your child and effortless for you from birth through to
CYBEX Sirona T i-Size 360° Rotating Toddler Car Seat
Extended Rear-Facing Convertible Car Seat - Birth to 105cm (Approx. 4 Years)
Experience the ultimate in safety and convenience with the CYBEX Sirona T i-Size 360° Rotating Toddler Car Seat. This innovative convertible car seat combines extended rear-facing protection with revolutionary 360° rotation, making every journey comfortable for your child and effortless for you from birth through to approximately 4 years.
What's Included with the Sirona T i-Size
Complete Car Seat Package:
- CYBEX Sirona T i-Size rotating car seat
- Newborn inlay for use from birth
- 12-position height-adjustable headrest
- Integrated Linear Side-impact Protection (L.S.P.)
- 5-position recline system
- 5-point safety harness with automatic adjustment
- Breathable comfort fabrics
- Machine-washable seat covers
- Detailed instruction manual
Please Note: The 360° rotating ISOFIX Base T is sold separately and is required for installation and rotation function. The Sirona T cannot be installed using a vehicle seat belt.
Key Features & Benefits
Full 360° Rotation
- Complete 360° rotation for effortless access (requires Base T - sold separately)
- Rotate to car door in rear-facing position for easy loading
- Switch to forward-facing and rotate for convenient access
- One-handed operation with smooth mechanism
- Click stops every 90° for secure positioning
- No back strain or awkward reaching
- Perfect for managing active toddlers in tight spaces
Extended Rear-Facing Safety
- Rear-facing from birth to 105cm (approximately 4 years)
- Up to 5 times safer than forward-facing for young children
- Protects developing neck and spine
- Reduces impact forces in frontal collisions
- Follows latest pediatric safety recommendations
- Extended protection during crucial development years
- Forward-facing option available from 76cm when appropriate
Birth to 4 Years in One Seat
- Suitable from birth with included newborn inlay
- Grows with your child to 105cm (approximately 4 years)
- No need to purchase multiple car seats
- Long-term investment in safety and convenience
- Seamless progression from infant to toddler
- Maximum value from single seat purchase
- Sustainable choice reducing waste
i-Size Safety Excellence
- Meets latest i-Size (R129) safety regulations
- Height-based sizing for accurate fit
- Enhanced side-impact protection standards
- Rigorous crash testing exceeds requirements
- ISOFIX installation with Base T ensures stability
- Engineered and tested in Germany
- ADAC tested and approved
Linear Side-Impact Protection (L.S.P.)
- Advanced energy-absorbing technology
- Reduces collision forces by up to 25%
- Adjustable side-impact protectors
- Protects head, neck, and upper body
- Extends automatically when installed on Base T
- Additional safety layer beyond standard requirements
- Premium protection in all seating positions
5-Position Recline System
- Five comfortable recline positions
- Suitable for sleeping and awake toddlers
- Easy one-hand recline adjustment
- Works in both rear and forward-facing modes
- Prevents head slump during naps
- Comfortable for long journeys
- Harness automatically adjusts with recline
12-Position Adjustable Headrest
- Grows with your child from birth to 4 years
- 12 height positions for perfect fit
- Integrated harness adjustment system
- One-handed operation for quick changes
- Ensures proper head protection at all stages
- No threading harness through slots
- Automatic harness height adjustment
Premium Comfort Features
- Breathable fabrics for temperature regulation
- Padded seat and harness for comfort
- Generous padding around head and body
- Soft-touch materials gentle on skin
- Available in Comfort and Plus fabric options
- Ergonomic design for proper posture
- All-season comfort for year-round use
Compatibility
Base Compatibility:
- ✅ CYBEX Base T - Required for installation (sold separately)
- ✅ CYBEX Base Z2 - Also compatible
- ❌ Cannot be installed with vehicle seat belt
- ❌ Not compatible with other bases
Part of T-Line Modular System:
- Use Base T with Cloud T i-Size (birth to 24 months)
- Continue using same Base T with Sirona T (birth to 4 years)
- Single base investment lasts from birth to 4 years
Vehicle Compatibility:
- ✅ All vehicles with i-Size seating positions
- ✅ Vehicles with ISOFIX anchor points and Base T
- ⚠️ Check vehicle compatibility list before purchase
Understanding Comfort vs Plus Fabrics
The CYBEX Sirona T i-Size is available in two fabric options:
Comfort Fabric
- Premium polyester fabric
- Soft, comfortable seating surface
- Excellent breathability
- Machine washable at 30°C
- Available in 2 colourways
- Excellent quality at accessible price point
Plus Fabric (Premium Option)
- Advanced 3D mesh fabric inserts
- Enhanced breathability for superior comfort
- Reduces humidity and prevents moisture buildup
- Ideal for warmer climates or summer babies
- Available in 5 premium colourways
- Typically £30-40 more than Comfort version
- Machine washable at 30°C
Safety & Guidelines
Safe Use Recommendations:
- Suitable from birth (45cm) to 105cm (approximately 4 years)
- Maximum height: 105cm
- Requires Base T or Base Z2 for installation
- Rear-facing recommended until at least 15 months (legal minimum)
- Extended rear-facing to 105cm strongly recommended for safety
- Forward-facing from 76cm onwards (when developmentally appropriate)
- Always use 5-point harness
- Regular safety checks of all components
- Never use without proper base installation
Rear-Facing vs Forward-Facing:
- Rear-facing (birth to 105cm): Up to 5x safer in crashes
- Forward-facing (76-105cm): Available when child ready
- Extended rear-facing strongly recommended by safety experts
- Child can rear-face comfortably with legroom
i-Size Regulations:
- Complies with ECE R129 (i-Size) standards
- Height-based rather than weight-based sizing
- Mandatory extended rear-facing requirements
- Enhanced side-impact protection
- ISOFIX installation required
Perfect For
- Parents wanting maximum safety with extended rear-facing
- Families seeking birth-to-4-years single seat solution
- Those with Base T continuing from Cloud T i-Size
- Active toddler parents needing rotation convenience
- Safety-conscious families prioritising crash protection
- Parents with back issues benefiting from rotation
- Design-conscious buyers wanting premium aesthetics
- Long-term value seekers avoiding multiple seat purchases
Technical Specifications
- Safety standard: ECE R129 (i-Size)
- Age/Height range: Birth (45cm) to 105cm (approximately 4 years)
- Rear-facing: Birth to 105cm
- Forward-facing: 76cm to 105cm
- Installation: ISOFIX with Base T or Base Z2 (sold separately)
- Rotation: Full 360° with Base T
- Side-impact protection: Linear Side-impact Protection (L.S.P.)
- Headrest positions: 12 adjustable heights
- Recline positions: 5 positions (rear and forward-facing)
- Harness: 5-point with automatic adjustment
- Weight: Approximately 8-9kg (seat only)
- Origin: Designed and engineered in Germany
Why Choose the CYBEX Sirona T i-Size?
- Birth to 4 Years: Single seat from newborn to preschooler - maximum value
- 360° Convenience: Revolutionary rotation in rear and forward-facing modes
- Extended Rear-Facing: Up to 5x safer protection to 105cm
- i-Size Safety: Latest safety standards with rigorous crash testing
- German Engineering: Premium quality and innovative design
- L.S.P. Technology: Advanced side-impact protection reduces forces by 25%
- Part of Modular System: Use with existing Base T from Cloud T i-Size
- 12-Position Headrest: Grows perfectly with your child
- 5 Recline Positions: Comfort for sleeping and awake toddlers
Care & Maintenance
- Remove and machine wash covers at 30°C
- Wipe plastic shell with damp cloth
- Check Base T connection regularly
- Inspect harness for wear before each use
- Clean buckle with soft brush if needed
- Never use bleach or harsh chemicals
- Air dry all fabrics - do not tumble dry
- Regular safety inspection of all components
- Store instruction manual with seat
Extended Rear-Facing: Why It Matters
The Science of Safety:
In a frontal collision (70% of serious accidents), forces are distributed differently:
Forward-Facing Child:
- Head thrown forward with extreme force
- Immature neck and spine vulnerable to injury
- Harness must restrain entire body weight
- Higher risk of head and spinal injuries
Rear-Facing Child:
- Impact forces spread across entire back
- Car seat shell protects head, neck, and spine
- Body supported by seat during collision
- Up to 5 times safer in crashes
Why Extended Rear-Facing to 105cm?
- Child's neck not fully developed until age 4-6
- Muscles and ligaments still strengthening
- Head proportionally larger and heavier
- Maximum protection during crucial growth
- International safety experts recommend
- Swedish standard (world's safest) promotes extended rear-facing
Common Concerns Addressed:
- ✅ Legroom: Children comfortable with bent legs
- ✅ Car sickness: No higher risk rear-facing
- ✅ View: Many children prefer rear-facing
- ✅ Developmental: Rear-facing doesn't hinder development
The Sirona T makes extended rear-facing easy with 360° rotation access and multiple recline positions.
From Cloud T to Sirona T: Seamless Transition
Your T-Line Journey:
Stage 1: Birth to 18-24 Months
- Use Cloud T i-Size on Base T
- 180° rotation for infant convenience
- Travel system compatibility with pushchair
- In-car recline function
Transition Time: 18-24 Months
- Child approaches 87cm height limit for Cloud T
- Purchase Sirona T i-Size
- Remove Cloud T from existing Base T
- Click Sirona T onto same Base T
- No reinstallation needed
- Immediate 360° rotation benefit
Stage 2: 18 Months to 4 Years
- Extended rear-facing to 105cm
- Full 360° rotation convenience
- 12-position headrest grows with child
- Forward-facing option when appropriate
- Use until approximately age 4
The Base T Advantage:
- Install once, use for 4 years
- No learning curve with new base
- Consistent safety and convenience
- Maximum value from single base
- Sustainable choice
Available Colourways
Comfort Fabric Colours (2 options):
- Sepia Black - Sophisticated deep black
- Mirage Grey - Contemporary neutral grey
Plus Fabric Colours (5 options):
- Leaf Green - Fresh, modern green
- Platinum White - Clean, elegant white
- Peach Pink - Soft, gentle pink
- Mirage Grey - Neutral grey with enhanced breathability
- Sepia Black - Deep black with premium mesh inserts
All colourways feature CYBEX's signature premium construction and coordinate beautifully with the T-Line system and CYBEX pushchairs.
Why Parents Choose Sirona T Over Competitors
vs Standard Convertible Seats: ✅ 360° rotation (most don't rotate at all) ✅ Extended rear-facing to 105cm (many stop at 90cm) ✅ Part of modular system (use same base as infant seat) ✅ German engineering standards ✅ L.S.P. technology superior to basic seats
vs Other Rotating Seats: ✅ Part of T-Line system (base continuity) ✅ Premium fabric options ✅ 12-position headrest (more than competitors) ✅ 5 recline positions ✅ Proven CYBEX safety reputation ✅ Aesthetic design premium
vs Budget Options: ✅ Superior crash test results ✅ Rotation prevents daily back strain ✅ Premium materials last through multiple children ✅ Higher resale value ✅ Peace of mind worth investment
The CYBEX Difference
CYBEX doesn't just meet safety standards - they redefine them. As pioneers of rotating infant carriers (since 2018) and extended rear-facing advocates, CYBEX combines German engineering precision with real parent needs.
Innovation Leadership:
- First rotating infant car seat (2018)
- Advanced L.S.P. side-impact technology
- Modular system thinking
- Award-winning designs
Safety Excellence:
- Exceeds minimum requirements
- Independent crash test winner
- Real-world accident analysis
- Continuous improvement philosophy
Design Philosophy:
- Function drives form
- Parent-centric features
- Premium materials standard
- Aesthetic without compromise
Experience the perfect combination of extended rear-facing safety, 360° convenience, and birth-to-4-years value with the CYBEX Sirona T i-Size - where German engineering meets modern parenting.
Requires Base T or Base Z2 (sold separately). i-Size approved (birth to 105cm). 360° rotation. Extended rear-facing. Premium German engineering. Read more at cybex-online.com
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 24 reviews
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Product Reviews
★★★★★ 2
Good for already soft mattresses, 1in thickness.
Color: Dark Grey, Size: Queen
If your mattress is already soft, it will help. It's less than 1in thick after tumbling for 40 minutes. It did fit my queen bed and felt somewhat soft when laying down but it didn't help much as far as comfort. Quality wise it looks good, not cheap and while my sleep quality wasn't improved, it might help someone with a better mattress than mine.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 1, 2026
★★★★★ 5
Must have for mattress comfort and protection
Color: Green, Size: Twin, Color: Green, Size: Twin
I ordered the BDEUS Twin mattress topper for a temporary mattress. The topper definitely improves comfort and regulates temperature much better than just the mattress and sheets. The cover fits deep mattress easily fitting over my 13” mattress and could easily fit a much deeper bed. The padding is thick enough to provide some additional support. This model also has a thin sheet of waterproof material to help protect your mattress against spills or liquid damage. This layer is cover by the pillow top and does not seem to make much if any noticeable noise. Overall this is a high quality cover and mattress protector in one. At <$45 at the time of this review it provides an incredible value.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2026
★★★★★ 5
Topper
Color: Green, Size: Twin
I recently purchased the BDEUS Twin Mattress Topper Viscose Derived from Bamboo, and I am thoroughly impressed with my experience.
The comfort level is absolutely a 5 out of 5. The viscose bamboo material feels soft and plush, making my bed significantly more comfortable to sleep on. I wake up feeling well-rested and supported, which has been a noticeable improvement from before.
Here are some of the main pros and cons:
Pros: Incredible comfort and softness, high-quality materials, fits the twin mattress perfectly, and helps with temperature regulation throughout the night.
Cons: Name
Overall, I give the BDEUS Twin Mattress Topper a solid 5 out of 5 stars. It has completely transformed my sleeping experience, and I would highly recommend it to anyone looking to enhance the comfort of their bed.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2026
★★★★★ 5
Adds comfort and support
Color: Green, Size: Twin
I’ve been using this bamboo mattress topper for a couple of weeks now, and it completely changed the feel of my bed. My mattress was starting to feel too firm and uncomfortable, especially on my lower back and shoulders, but this topper added the perfect amount of cushioning without making the bed feel overly soft or saggy.
The cooling effect was one of the biggest surprises. I tend to sleep hot and usually wake up sweating during the night, but the bamboo-derived fabric feels breathable and much cooler than regular mattress pads I’ve owned before. It stays comfortable throughout the night and doesn’t trap heat like memory foam toppers sometimes do.
I also really appreciate the waterproof protection. It gives peace of mind without feeling stiff or making that annoying crinkling noise some waterproof covers have. The surface still feels soft, plush, and smooth. It honestly feels more like a hotel-style pillow top than a basic mattress pad.
The thickness is just right for pressure relief. It helped reduce the soreness I usually wake up with in my back, and I’ve been sleeping much more comfortably overall. The deep pockets also held securely on my twin mattress and didn’t slide around, even after moving a lot during sleep.
Another thing I liked was how fluffy and well-made it looked right out of the package. After letting it expand for a bit, it became nicely plush and evenly padded. The stitching seems durable, and it still looks great after washing.
If you’re looking for a softer, cooler sleeping surface with added waterproof protection and better support for aches and pains, this mattress topper is definitely worth it. It made my bed feel newer and far more comfortable without needing to buy a whole new mattress.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 14, 2026
★★★★★ 5
BDEUS Twin Mattress Topper, So Soft
Color: Green, Size: Twin, Color: Green, Size: Twin
Having purchased BDEUS products in the past, I was very looking forward to ordering the mattress topper made of viscose (a material derived from bamboo) just to see (and feel) the benefits of the material.
My concern about the material, viscose derived from bamboo, is that the process to manufacture the material can be chemically intensive leading to harsh smells. I can say the topper has no off-putting smells. The quality of the manufacturing is present as there are no loose threads/seams, the material has no defects, and the print is uniform. The use of the material also leads to increased durability while enhancing the topper’s breathability and cooling properties.
The topper is fitted meaning the topper will not come off the mattress very easily (even though you may need sheet straps if you are a wild sleeper). But the softness is wild, I mean this has to be one of the softest materials I have felt, and it feels very luxurious. Waterproofing and moisture-wicking is also a benefit as small spills are not absorbed into the fabric.
The topper is also very thick and plush, and while the product listing touts “Back Pain Relief” it may be too soft depending on how firm, or soft, you prefer your mattress. I have to say this is definitely a five-star offering from BDEUS. This topper is for my daughter but I’m going to order a queen-sized topper for my bed as the price is just right.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 14, 2026
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