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Ships within 48 hours · Estimated delivery Jul 18 - Jul 23
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Description
cybex sirona s flame retardant Nuna AACE Booster SeatFrom cute pre schooler to independent pre teen. Its the longest and shortest time, and AACE grows right along with your child. From the fabric to the foam and beyond, each element is smartly sourced to be flame resistant with no added fire retardant chemicals. The customizable side impact protection pods and belt path indicators make riding super secure. Theyll enjoy wearing a seatbelt just like you do. And youll be happy because you know theyre safe.
From cute pre-schooler to independent pre-teen. It’s the longest and shortest time, and AACE grows right along with your child. From the fabric to the foam and beyond, each element is smartly sourced to be flame resistant with no added fire retardant chemicals.
The customizable side impact protection pods and belt-path indicators make riding super secure. They’ll enjoy wearing a seatbelt just like you do. And you’ll be happy because you know they’re safe. And comfy. When you have an adjustable headrest, and an extendible, expandable seat with eight recline positions, how could they not be?
3D growth™ system
- Grow up—one-hand, 9 position height adjustable headrest
- Grow out—shoulder system works simultaneously with the headrest, expanding out while growing up
- Grow on—seat sports 3 depths giving growing legs plenty of support and space
2-in-1 design
- Converts from a high back to a no back booster
Secure
- Energy absorbing foam and SIP pods take side impact security to the next level
- Belt positioner aids in correct shoulder belt routing and minimizes user error
- Colored belt path indicators help decrease risk of user error
- Lower anchor connectors easily secure car seat to vehicle seat during use or transport
Comfortable
- From fabric to foam and beyond, each element is smartly sourced to be flame resistant with no added fire retardant chemicals
- Customizable recline thanks to 8 different positions*
- Ventilation panels within the shell and breathable (and washable!) knit fabric create a comfy climate for even the longest of trips
- Little arms can take a break thanks to cozy, built-in armrests
*in high back mode only when using lower anchor connectors
Sleek
- Sleek and chic micro-knit fabric is easy to remove and machine washable
- Included cup holder is removable and dishwasher safe
Accessories
AACE starter kit includes a cup holder, belt positioning clip & a set of LATCH guides (included with purchase)
Usage:
- High back booster
- 40–110 lbs | 38–60 in
- suggested 4 years +
- No back booster
- 50–120 lbs | 38–60 in
- suggested 5 years +
- Seat weight: 15.6 lbs
- Seat dimensions (in): 26 H x 15 L x 21.5 W
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
4.1 ★★★★★
Based on 17 reviews
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Product Reviews
★★★★★ 5
So comfortable!
Size: Standard (2 Pillows + 2 Protectors), Style: Medium, Configuration: Pillows + Protectors
The best pillow I've ever gotten. I always slept on two pillows and now I only need this one.
The height is perfect and it is so comfortable. I highly recommend this pillow for people like me
who could never find the right one.
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Reviewed in the United States on May 12, 2026
★★★★★ 5
Feel like I am in hotel
Size: Standard (Pack of 2), Style: Soft, Configuration: Pillow
These pillows are absolutely amazing! They feel just like the luxurious ones you find in high-end hotels—soft, fluffy, and super comfortable. They provide great support for my head and neck, helping me sleep better every night. The white design is clean and classic, and they hold their shape well without going flat. I bought two and couldn’t be happier—worth every penny! Highly recommend for anyone wanting hotel-quality comfort at home.
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Reviewed in the United States on April 1, 2026
★★★★★ 5
Great set of pillows!!!
Size: Standard (Pack of 2), Style: Soft, Configuration: Pillow
I ordered this set of two down alternative pillows to replace some older pillows, and I’m honestly really impressed with the quality.
Right out of the package, the pillows fluffed up nicely and felt soft yet supportive. They have that plush feel you want without being too flat or too firm, which makes them comfortable in multiple sleeping positions.
I’ve been sleeping on these for a bit now and they’ve held their shape well throughout the night. They provide good neck support while still feeling cozy, and I don’t wake up with soreness or stiffness.
What I like most is how breathable they feel compared to some other pillows I’ve tried. They stay comfortable without overheating, and the down alternative fill makes them a great option for anyone with allergies.
Overall, this set is an excellent value for the price. If you’re looking for soft, supportive pillows that feel comfortable and well made, I would definitely recommend these.
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Reviewed in the United States on February 10, 2026
★★★★★ 4
Great, soft, high-quality pillows, but too thick for me
Size: Standard (Pack of 2), Style: Soft, Configuration: Pillow
This will be a brief review of my pillow journey. I tried a few of the most popular pillows, like MyPillow, Amazon Basics, bamboo/shredded foam, memory pillows, but my most common complaint about them were that they were all just too high and firm for me. I am a restless sleeper and alternate between back, side, and stomach sleeping, and I strongly preferred the stomach sleeper/flat pillows with a polyester fiber/down alternative filling.
Here's a ranking of my 4 top pillows:
Eversnug Adjustable Layer Pillows - (#1)
These were THE pillow for me. I had never heard of these pillows or the company, but I really like being able to adjust my pillow. These pillows came with 2 small, 2 medium, and 2 large pillows and 2 twin zippable pillow pouches. All of them were polyester fiber filled and somewhat flat and soft, but not lumpy. The pillows may not come the exact same sizes, but they are close enough for me. These are the pillows I ultimately decided to stick with, despite being slightly more expensive than the others at $50 for a set of 2 pillows.
Nappler Bamboo Shredded Memory Foam Pillow - (#2)
Before I found the Eversnug pillows, I was trying the adjustable bamboo shredded memory foam ones. These were my go-to whenever I was testing pillows I didn't like very much. The only downside to these pillows is that if you don't add enough filling, you could feel the edges of the shredded foam. Also, the "bamboo" cover was way too warm and the inner zipper would get too easily caught.
Amazon Basics Down Alternative Pillow - (#3)
I don't think I've ever been disappointed by an Amazon Basics product yet. These pillows were soft, amazing pillows, but they were 1-2 inches too thick/firm for me.
MyPillow - (#4)
Despite all the hype around these, they were too lumpy and 1 inch too thick for me.
Like I said previously, I ended up going with the Eversnug Adjustable pillows, which I absolutely adore. A tiny bonus is that you can take the pillows you don't use and rest them on your sides or between your knees for some extra cushioning.
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Reviewed in the United States on July 12, 2023
★★★★★ 5
Good price and pretty comfortable
Size: Standard (Pack of 2), Style: Soft, Configuration: Pillow
These down alternative pillows are incredibly soft and comfortable, especially for stomach and back sleepers. The soft density gives just the right amount of support without feeling too firm or too flat. I’ve been sleeping much better since switching to these pillows, and they stay fluffy throughout the night.
I also love that they’re hypoallergenic, so there’s no irritation or overheating while sleeping. The standard size fits perfectly in my pillowcases, and the white color looks clean and fresh. Getting a 2-pack at this quality is a great value. Highly recommend for anyone looking for cozy, hotel-style pillows at an affordable price!
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Reviewed in the United States on May 11, 2026