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- USA
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Ships within 48 hours · Estimated delivery Jul 11 - Jul 16
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Description
nuna mixx stroller seat replacement Nuna Demi Next Sibling SeatDid your plus one just become two? When love multiplies, the Nuna Demi Next Sibling Seat sibling seat helps you reach your next level of adventure. It adds extra seating options to your Nuna DEMI next stroller, meeting you on your level and accommodating your shifting needs. The Nuna DEMI next system is crafted to grow with possibilities, provide options, and have everything you need plus everything you didnt know you needed. Its a lifestyle that
Did your plus-one just become two? When love multiplies, the Nuna Demi Next Sibling Seat sibling seat helps you reach your next level of adventure. It adds extra seating options to your Nuna DEMI next stroller, meeting you on your level and accommodating your shifting needs. The Nuna DEMI next system is crafted to grow with possibilities, provide options, and have everything you need plus everything you didn’t know you needed. It’s a lifestyle that empowers you to choose your own path, your own pace, and your own preferences.
It’s the ultimate accessory for modern family living that’s designed to grow with next-level possibilities.
Nuna Demi Next Sibling Seat Features:
- Connects easily to the DEMI next stroller frame in the top or lower position and becomes a duplicate of the main seat
- Roomy enough to provide a comfy place all their own
- Forward and rear-facing seat options
- Self-guiding MagneTech secure snap™ buckles automatically lock into place
- All-season seat keeps baby cozy in winter and easily converts to mesh in summer
- Four recline positions easily adjust with just one hand
- One-hand adjustable calf support and footrest to accommodate growth
- Simple install in lower basket area with no adapters needed
- Quick-release 3 to 5-point harness makes it easy to fasten them in
- Water-repellent UPF 50+ Aire protect canopy™ protects from the elements
- No-rethread harness makes it easy to adjust for comfort and growth
- Integrated footrest on seat for added comfort
- Rotating and removable armbar fits kids of all sizes
- Easily removable Merino wool insert provides ultra-soft comfort
- Built-in privacy drape and ventilation panels in the canopy for ideal airflow
Note: When using the stroller frame with the bassinet or infant carrier, refer to the child usage requirements listed in those instruction manuals.
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 462 reviews
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Product Reviews
★★★★★ 5
Solid choice for pillow inserts!
Color: White, Size: 12x20 Inch
Nice quality, firm yet soft. Really the perfect pillow for what I needed. Fit perfectly in my 12x20 cover. A solid choice at a good value!
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Reviewed in the United States on April 29, 2026
★★★★★ 4
Glad I chose these Sturdy, Fluffy Pillows
Color: White, Size: 18x18 Inch
Took me forever to decide which pillows to buy....Price won out. There might be better out there, but I really can't see how. They plumped up really nicely. I once learned from a manager at a big box dept store when purchasing a goose down pillow how to 'activate' the pillow. Basically, he violently threw the pillow down onto the floor, then proceeded to beat the tar out of it....That's how it's done. I think many ppl don't do a good enough job when they get their pillows. I watched several videos from ppl who have purchased this type of pillow. And quite frankly, they do not know what they are doing....My pillows are very plump and awesome. I purchased the 20" squares and then chose 18" pillow covers to stuff them into. Perfection. Fat, soft, soothing pillows. Me and my Doggo are quite happy to lounge around on these durable puffs of fluffiness.
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Reviewed in the United States on May 14, 2026
★★★★★ 5
Excellent Inserts. Great price point.
Color: White, Size: 12x20 Inch
I purchased the 20x20 first and loved them so much, I purchased these the next day. They come vacuum sealed so please do be careful opening them. It takes a little time and patience. These fluff up so nicely. I manipulated by hand a bit then into the dryer with wool dryer balls on medium heat for about 20 minutes. They are odor free which is a big plus for me and the quality is there for the price. I can't use feather inserts for anything so these are the next best I've found at this price point. I will be purchasing more and I do recommend.
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Reviewed in the United States on May 6, 2026
★★★★★ 5
Fluffy and Supportive Pillow Inserts
Color: White, Size: 12x20 Inch, Color: White, Size: 12x20 Inch
I used these pillow inserts for my couch cushions, and they’ve worked out really well. They give my throw pillows a nice full look without being too stiff or flat, which makes the couch feel more put together and comfortable.
Filling quantity: They’re nicely filled and give good shape without feeling overstuffed.
Durability: They seem well-made and hold their shape well even after daily use.
Color: Clean, bright white that works well with different pillow covers.
Appearance: They make my decorative pillows look fluffy and full, giving the couch a more finished look overall.
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Reviewed in the United States on May 8, 2026
★★★★★ 5
Exactly what I was looking for
Color: White, Size: 26x26 Inch
I bought these to fill some euro pillow covers and they worked out really well. They come vacuum packed, so at first they look flat, but once you open them and give them a little time, they fluff up nicely.
They are soft but still have enough structure to hold their shape on a bed or couch, which is exactly what I was looking for. Not overly firm, but not limp either. They give that full, styled look without feeling stiff.
The size is true to 26x26 and fills the covers well without looking saggy. I like that they don’t feel hollow like some cheaper inserts can.
Quality feels good for the price. They are not luxury pillows, but definitely a solid option for decorative use and they hold up well.
Overall, really happy with them and would buy again for other rooms.
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Reviewed in the United States on April 14, 2026
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