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Ships within 48 hours · Estimated delivery Aug 3 - Aug 8
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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
4.2 ★★★★★
Based on 19 reviews
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Product Reviews
★★★★★ 5
Excellent Office Chair
Color: Black+white, Size: Pack of 1
I just received my TRALT Office Chair. First of all, I was impressed with the packaging of this item. When I opened the box each piece of the chair was wrapped in plastic or bubble wrap. Everything in the box arrived safely and without damage. Secondly, the instructions to assemble the chair were very each to follow. I was impressed with the Allen wrench which had a handle attached to it. This made screwing in the screws very easy. I was able to assemble the chair without any difficulty. Lastly, the look of the chair and the comfort is exceptional. I ordered the black/white chair which looks amazing. The comfort of the chair is really excellent. My back is supported by the lumbar seat and having the armrests being able to go up when not needed is wonderful. The quality of the chair is definitely worth the price.
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Reviewed in the United States on May 9, 2026
★★★★★ 4
a good choice
Color: Black, Size: Pack of 1, Color: Black, Size: Pack of 1
Assembled chair only to find that the lift cylinder was faulty. Would have preferred to be able to just get a replacement cylinder but calling China didn't seem like a viable option. Guessing which one & buying it online would involve paying for a good portion of what the chair cost. Customer service could only offer a replacement or refund. We're disassembling (so much fun?!) to send it back. The chair itself was very comfortable, assembled fairly easily and instructions pretty clear. Again, if we could only have asked the seller for the replacement part......**Update**...Or if the instructions that seemed so clear were clearer!, as we started to disassemble, we decided to see what would happen if the tension knob (see photo) was loosened. IT ALLOWED THE LIFT CYLINDER TO WORK. Not at all what the instructions say. At any rate, we're keeping the chair.
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Reviewed in the United States on June 4, 2026
★★★★★ 5
This chair is amazing
Color: Sky Blue, Size: Pack of 1, Color: Sky Blue, Size: Pack of 1
⭐⭐⭐⭐⭐
Absolutely love this chair! It was super easy to assemble—I had it set up in no time with clear instructions and minimal effort. The comfort level is fantastic; the seat cushion is just right and the back support makes it great for longer sitting sessions.
The color is beautiful in person—clean, modern, and adds a fresh pop to the room without being overwhelming. I also really like the smooth wheels and sturdy build; it feels stable and well-made.
Overall, this is a great combination of style, comfort, and value. Highly recommend!
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Reviewed in the United States on May 4, 2026
★★★★★ 5
Excellent Ergonomic Chair
Color: Black, Size: Pack of 1
I am incredibly impressed with this chair. The setup was a breeze and took me less than 20 minutes from start to finish. It is exceptionally comfortable, offering fantastic ergonomic support that keeps my back pain-free during long hours of sitting. The materials feel premium and highly durable. Plus, the included 5-year warranty is incredibly helpful and provides great peace of mind. I highly recommend it to anyone looking for a reliable workspace upgrade!
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Reviewed in the United States on May 25, 2026
★★★★★ 5
Comfortable, Sturdy, and Great for Long Hours
Color: Black, Size: Pack of 1
I am very happy with this office chair. It was easy to assemble, feels sturdy, and is very comfortable to sit in for long periods of time. The ergonomic design provides good back support, and the adjustable features make it easy to find the perfect position. The mesh back keeps me cool throughout the day, and the chair rolls smoothly. Overall, it offers great quality for the price and has made working at my desk much more comfortable. I would definitely recommend it to anyone looking for a reliable office chair. ⭐⭐⭐⭐⭐
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Reviewed in the United States on May 30, 2026
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