Sealy Butterfly Breathable Knit Crib and Toddler Mattress: Firm, Hypoallergenic, Waterproof Cover, High-Density Foam
$79.99
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4.7 out of 5 stars with 34 reviews
92% would recommend
13 recommendations
3 out of 5 stars
5 September, 2025Verified purchase
Its ok for the price
This crib mattress is decent enough, especially for the price point. This seems to be pretty standard for what you’ll get unless you jump into the “luxury” mattresses like a newton. It’s firm enough that I am not concerned if my baby sleeps on their belly. The description says there is an infant side and a toddler side. It’s just a piece of moderately dense foam with a cover. On side of the cover is more like a waterproof mattress cover and the other side is just a fine mesh. Not sure if they are suggesting the cover itself is supposed to make the foam more solid or something? So that is a bit misleading. Also, putting my face up against it, it’s not breathable in the sense of being able to breathe through it like a Newton crib mattress. It is breathable in the sense of its foam so it should keep cool vs a pillow top mattress or something similar. It also does have about a 2in gap length wise in a standard size crib. Not the end of the world, nothing will happen with that so definitely safe, but just noteworthy. Width wise it fills a standard size crib well, no gapping. I have a newton mattress. Bought it when my first was born. It is amazing and I definitely think it’s worth the investment. It’s held up perfectly through years of use. I got this one to toss in the crib downstairs in case my fiends/family needed a space to put their baby down as well when they come visit but I didn’t want to invest in another newton for the frequency this will be used. It serves my purpose well and I’m happy with the purchase. That being said, if it’s your first, consider investing in a higher end crib mattress vs this one. I can see this one not holding up for years of daily use since it’s literally just some dense foam. Photos added to show the two sides of the cover I mentioned. Just a photo of the foam mattress itself and then the small gap it leaves length wise in a standard crib.
5 out of 5 stars
29 April, 2025
originally posted on influenster.com

Perfect size
[This review was collected as part of a promotion.] This mattress is the perfect size for a toddler bed. It’s nice and soft very breathable. My baby likes to use it to sit in front of the tv so I guess you can say it’s mobile lol
5 out of 5 stars
8 April, 2025
originally posted on influenster.com

We love it
[This review was collected as part of a promotion.] The Sealy Butterfly Breathable Knit Crib Mattress is an excellent choice for parents looking to provide their baby with both comfort and safety. Its breathable knit fabric helps regulate airflow, keeping your little one cool and comfortable throughout the night. The mattress features a firm, supportive surface ideal for infant sleep, promoting healthy spinal development while ensuring a restful sleep environment. The mattress is lightweight and easy to handle, making it a breeze to change sheets. Plus, the hypoallergenic materials offer peace of mind, knowing your baby is resting on a safe, clean surface. With its durable construction and easy-to-clean design, the Sealy Butterfly is a top contender for parents looking for quality and reliability in a crib mattress.
5 out of 5 stars
4 April, 2025
originally posted on influenster.com

Great baby matress
[This review was collected as part of a promotion.] Baby sleeps 12 hours on this matress. Very breathable and durable and I feel safe knowing my baby is sleeping on it. It seems comfortable for her and it really makes her sleep good.
5 out of 5 stars
26 March, 2025
originally posted on influenster.com

Great soft durable mattress
[This review was collected as part of a promotion.] I love this mattress! Opened it up put a sheet on it and put it in my 3 year olds crib So breathable and soft. Durable and firm. Perfect for my daughter. 10:/10
5 out of 5 stars
23 March, 2025
originally posted on influenster.com

Nice and breathable
[This review was collected as part of a promotion.] This is a great little crib mattress! It seems to be very supportive but also light and breathable which is very important so babies don't overheat at night. It appears it will last a while!
5 out of 5 stars
22 March, 2025
originally posted on influenster.com

Butterfly effect
[This review was collected as part of a promotion.] This crib mattress is amazing. It has such. Great feel to it with the memory foam. The set up was super easy first you unroll and then let it expand for 48 hours. My baby loves it. It can fit in a crib or twin platform bed. It also comes with a cover five stars all around.
5 out of 5 stars
20 March, 2025
originally posted on influenster.com

The mattress is lightweight yet firm, providing th
[This review was collected as part of a promotion.] We’ve been using the Sealy Butterfly Breathable Knit Crib Mattress for a week now, and it has been a great choice for our baby. The mattress is lightweight yet firm, providing the right level of support for safe sleep. The breathable knit cover feels soft and adds a nice touch of comfort. I also appreciate that the waterproof barrier helps keep the mattress clean and protected from accidents. It fits snugly in our crib with no gaps, which gives me peace of mind.
5 out of 5 stars
20 March, 2025
originally posted on influenster.com

Great crib mattress!
[This review was collected as part of a promotion.] I love this crib mattress!! It fluffed right up after unfolding from the box! It has a great feel and super comfortable as it has a mild firmness but not to firm-its just right! It has a great washable cover woth nice breathable material that's very easy to zipper on and off! It fits beautifully into our crib! I would definitely reccomend this crib mattress!!
5 out of 5 stars
18 March, 2025
originally posted on influenster.com

So far so good!
[This review was collected as part of a promotion.] Great matress! It came rolled in a box & was so easy to unpackage and formed into its shape within the hour! Material is super soft & seems comfortable & durable. Can’t wait to see how it holds up in the future!
5 out of 5 stars
18 March, 2025
originally posted on influenster.com

Great quality baby crib mattress
[This review was collected as part of a promotion.] I just got the crib mattress from Sealy. The mattress came in vacuum sealed but the fluffed up really quick. It comes with a waterproof cover which I love! The firmness is just right for my baby!
3 out of 5 stars
Thumbs down graphic, would not recommend
16 February, 2025Verified purchase
Measurements were not accurate
Mattress is supposed to be 5 inches according to specifications. We measured multiple times after our baby hit head on a piece of wood in the crib. It’s 4inches barely so it did not fit our crib in height and baby hit head on wood side that we didn’t realize mattress didn’t cover in height so we will be returning. It also wasn’t as firm as hoping. Measurement specifications should be accurate for buyers.
1 reply from KolcraftStaff team - 7 months ago
Hi Maddy, all of our Sealy crib and toddler mattresses meet the USA standard. ASTM and JPMA certified cribs sold in the USA have standardized size requirements. The standard crib mattress size means that your crib mattress must fit snugly inside a USA standard size crib. Often, improper fitting mattresses are caused because the crib is not a standard size or it was assembled incorrectly.
4 out of 5 stars
Thumbs up graphic, would recommend
29 May, 2021
Mattress
The mattress itself is very breathable, but the cover it came with on top of the mattress is not breathable at allllll
5 out of 5 stars
17 March, 2021Verified purchase
Great Mattress so far!
I got this mattress and it seems great so far. I'm still expecting so haven't tried it out yet but it arrived and unrolled ok and was not lopsided. It didn't have a smell either. I was happy with my purchase.
5 out of 5 stars
31 January, 2021Verified purchase
Just what we were looking for
Looked for a while for a mattress with no springs and still has firmness. This mattress is perfect and she loves to sleep on it. The transition from the bassinet or co sleeping was wonderful.
5 out of 5 stars
Thumbs up graphic, would recommend
22 January, 2021Verified purchase
Amazing bed& great price
I love it! My baby sleeps all night! It’s firm but not to firm! Planning on buying my older daughter one as well! It didn’t take long to get delivered.
2 out of 5 stars
12 November, 2020Verified purchase
Disappointed
Disappointed by the mattress. Based on the glowing reviews it's received, thought it would be much nicer. Expected it to be 5" thick as advertised, but it's only 4" high on the side that fully expanded. The other side is about an inch less. I also expected one side to be firmer and the other a bit softer, also as advertised and they're both the same firm feel. Shipping took longer than expected as well. Expected more from a Sealy. The pros are that I like the soft breathable cover. Sadly, I am considering returning since it hasn't met my expectations from the specifications.
1 reply from KolcraftStaff team - 5 years ago
Hello Lauren, thank you for sharing your experience. Our mattresses include a warranty on workmanship and materials, if you would like to explore your warranty options, please contact us directly at consumerservices@kolcraft.com. Thank you for being a valued customer, we appreciate your feedback.
3 out of 5 stars
24 July, 2020Verified purchase
(no review title)
Purchased this mattress for my 19 month old. We loved it so much Thayer I purchased the same one for my newborn baby girl. Great quality great comfort affordable price!
5 out of 5 stars
Thumbs up graphic, would recommend
14 May, 2020
Fantastic
This matress is the best crib mattress I have ever used. It's super soft. It keeps my child from bouncing around at night. Now he sleeps soundly and doesn't wake up in the middle of the night. Wonderful!
5 out of 5 stars
Thumbs up graphic, would recommend
11 May, 2020
Highly recommend
I highly recommend this mattress, it is very comfortable yes I laid on it before I let my baby sleep on it. Quality is great and easily removable and washable crib mattress cover, soft material.this mattress is very light weight and fits standard crib perfectly. I will continue to recommend this as I already have to my friends and family for their special additions to their home, I feel so satisfied with this mattress! I received this crib mattress as a courtesy in exchange for testing purposes and this review is truly my own and very honest opinion!