Big Kid Bed (BKB) Mattress Review

BKB Staged Photo 1

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Big Kid Bed (BKB) Mattress Review

✔️Last updated: October 2021

✔️Customer Rating: 4.9/5
✔️Type: Foam blend
✔️Firmness: Firm
✔️Free Shipping & Returns
✔️100-Night Sleep Trial
✔️Lifetime Warranty

Editor’s Note: Shortages in the supply chain have created production limitations for the foreseeable future in some Casper products. Thank you for understanding.

The bottom line: The Big Kid Bed mattress was designed specifically for children transitioning from a crib to a toddler bed or child’s mattress. Nest Bedding considered all the important factors that support a good night’s sleep for young children. Plus, the Big Kid Bed mattress comes with a 100-night sleep trial and lifetime warranty.

Who Does It Work For?

Big Kid Bed Mattress Review is best for: Big Kid Bed Mattress Review may not be best for:
  • Toddlers
  • Children
  • Teens under 100lbs
  • Memory foam mattress shoppers
  • Hot sleepers
  • Those with allergies
  • All sleeping positions 
  • Adults
  • Teens or children over 100lbs
  • Those shopping for a mattress larger than full size

The Best of the BKB

top rated mattress for kids

Kids spend between 10–12 hours of their day sleeping. That’s almost half of their childhood years in bed! Your little ones need a quality mattress just like you, so we decided to take a closer look at the best mattresses for kids, including the Big Kid Bed by Nest Bedding. Not only is the Big Kid Bed mattress great for bunk beds, it’s designed specifically for kids’ growing bodies. Keep reading for our full review.

Why we love it:

  • Easy Assembly: No need to haul a wide mattress up the stairs—the Big Kid Bed is the first bed-ina-box mattress designed exclusively for kids. Just take it out of the box, unroll it on the bed frame, and show your kids how quickly it rises to form.
  • Breathability: Kids sleep hard, and that can make for some sweaty nights. The Big Kid Bed is infused with cooling gel and made from open cell foam that improves airflow.
  • Responsiveness: Do you have a restless sleeper? No problem. The Big Kid Bed top layer is conforming like memory foam and buoyant like an innerspring mattress. In other words, Dick or Jane will stay cozy as they toss and turn throughout the night.
  • Hypoallergenic: Nest Bedding uses only GREENGUARD Gold and Certipur-US certified foams in the Big Kid Bed, so it’s safe for kids with asthma and allergies.
  • Affordable Price: The Big Kid Bed should last from your child’s toddler years to adolescence. Plus, it’s made in the USA and shipped factory-direct, which keeps down costs.

Pluses and Minuses 

✅ Pros

  • The Big Kid Bed comfort layer is made with Nest Bedding’s proprietary Energex foam, which is significantly more responsive (i.e. bouncy) than traditional memory foam, and keeps your child supported on top of the mattress
  • The foam layers fill in the gaps along your little one’s delicate curves, which promotes healthy spinal alignment
  • The Big Kid Bed keeps motion transfer to a minimum, which is super helpful if you have kids sharing the bed.
  • Worried about your energetic sleeper sliding off the side of the bed? Rest assured that the Big Kid Bed has plenty of edge support.
  • Kids’ bodies need lots of support while they’re growing, and the firm feel of the Big Kid Bed is the right firmness level to keep their developing bodies in balance.

❌ Cons

  • Generally, foam mattresses can’t support as much weight as hybrid mattresses.
  • You may notice a slight off-gassing scent when you unbox your mattress, but it’s non-toxic and should be gone within a few hours.

Edge Support

We mentioned that the Big Kid Bed is a great choice for bunk beds because of its 7” low profile. If you plan to have a child sleep on the top bunk, edge support is extra important. 

The Big Kid Bed is made with a high density top layer and medium density base layer that handily supports the weight of your child from edge to edge. With that said, heavier children will cause the foam to compress more, so if you’re concerned about hearing that midnight “thump,” then keep lighter weight kids on the top bunk.

Motion Transfer

The Big Kid Bed is available up to a full size, which can easily sleep two smaller kids. With siblings or friends sharing the bed, you want to make sure their mattress minimizes motion transfer.

All-foam mattresses generally isolate motion well, and the Big Kid Bed is no exception. Two kids should be able to share this bed without disrupting each other if one has to go to the bathroom or get a drink of water (again).


Adult mattresses usually get all the fun, but we were impressed with the fancy cooling technology that Nest Bedding put into the Big Kids Bed. To start, the mattress cover is woven with phase change materials that absorb and store heat when it’s too warm and then release that heat when it’s too cool. Also, the top foam layer is infused with cooling gel that soaks up extra heat.

Firmness Level

The Big Kid Bed has a firm feel that is ideal for kids—about a 7 out of 10 on the firmness scale. A bed that’s too plush doesn’t provide enough spinal support for rapidly growing bodies. Keep in mind that the more weight on the mattress, the softer it will feel, so the Big Kid Bed may have closer to a medium firm feel for larger children.

Sleeping Position Support

The Big Kid Bed can comfortably support all sleeping positions. The foam construction adds extra cushion for side sleepers, while the firmer feel suits back and stomach sleepers.

Does it Sleep Hot?

The Big Kid Bed has a neutral temperature for most sleepers, thanks to the cooling features in the mattress cover and Energex foam.

Weight Capacity

Nest Bedding told us that the Big Kid Bed can comfortably support up to 100lbs.

Foundation Compatibility 

You can store the Big Kid Bed on pretty much any solid, flat surface, including bunk beds, but slatted beds shouldn’t have gaps wider than 4”. Nest Bedding discourages the use of box springs or flexible bed bases, since those can change the feel of the mattress.

Mattress Materials

While the Big Kid Bed is not a 100% organic mattress, it’s still made from eco-friendly, kid-safe materials, including a non-chemical fire barrier. Here’s what you’ll find on the inside.

Nest Bedding BKB Inside Look
  1. Cooling Cover: A quilted foam cover that includes temperature regulating phase change materials
  2. Comfort Layer: 2″ of 2.8lb Energex Foam that cushions pressure points and actively cools 
  3. Base Layer: 5″ of 1.8lb base foam that improves the support and durability of the mattress

Sizes and Prices

Size Dimensions Weight Price*
Twin 38” x 75” 30lbs $299
Twin XL 38” x 80” 35lbs $349
Full 54” x 75” 40lbs $499

*Prices do not reflect exclusive offers or discounts. Click below to see the best price for the Big Kid Bed Mattress Review mattress.

Unboxing Experience

The Big Kid Bed is compressed and rolled in a box. It takes next to no time for the Big Kid Bed to go from box to bed. Simply open the box, unroll the mattress on its bed frame, and carefully cut off the plastic packaging. Give your kids a physics lesson by asking them to watch the foam inflate. It should only take a few minutes for the mattress to rise to its full size, but don’t be surprised if it takes up to a few hours. 

Buying a Big Kid Bed

Here’s all the info you need to know when purchasing the Big Kid Bed mattress.

Policy Details
Delivery Free bed-ina-box delivery
Trial Period 100 nights
Warranty Lifetime warranty for original purchaser
Return Policy Free returns and exchanges
Financing Affirm

Product Shipment

You get free shipping on your new mattress if you live in the lower 48 states. Nest Bedding ships to Alaska and Hawaii, but there is an extra cost. Don’t worry about being home for your delivery—signature is not required.

Mark your calendars for delivery 4–8 business days after your date of purchase. Nest Bedding will email you a tracking number once your order has shipped. If you’d like white glove delivery, reach out to the Nest Bedding team at 888-992-2001. You can also request old mattress removal for $100. 

How Long’s the Sleep Trial?

You have a 100-night trial period to determine whether or not the Big Kid Bed is the right mattress for your child. It can take your kiddo a few weeks to fully adjust to their new Big Kid Bed, so Nest Bedding asks that you wait 30 days before making a final decision. 

Determining if the Big Kid Bed is the right type of mattress for your little one is pretty simple because kids tend to be vocal about what they do and don’t like. Keep an eye out for how well-rested they look and act, since a tired child could indicate that a mattress adjustment needs to be made. 

Warranty and Comfort Guarantee


Forget the industry standard 10-year warranty. Nest Bedding protects their mattresses with a lifetime limited warranty, applying to the original owner. If your Big Kid Bed mattress develops a covered defect, Nest Bedding will send you a repaired part or replacement mattress free of charge.

Covered defects include body impressions that are deeper than 1”, manufacturing flaws in the cover zipper, and tearing or stitch unraveling of the mattress cover (not resulting from misuse).

If you need to submit a claim, email, and include your order number, full name, and a written description and photo or video of the defect. You’ll hear back from the Nest Bedding team within 7 business days.

Lifetime Comfort Guarantee

Nest Bedding customers can also claim the Lifetime Comfort Guarantee, which enables you to buy one more Nest Bedding mattress for 30% off, as long as you haven’t returned or exchanged a mattress in the past.

Customer Service

The Nest Bedding customer service team is available over live chat (Facebook Messenger), email, and phone. Here are their service hours:

  • Live chat: Monday-Sunday, 9AM–5PM PST
  • Phone at 888-992-2001: Monday-Friday, 8AM–7PM PST; Saturday-Sunday, 7AM–6PM PST
  • Email at Monday-Friday, 7AM–5PM PST; Saturday-Sunday, 8AM–7PM PST 

Explaining the Return Policy

You can return or exchange your Big Kid Bed mattress after day 30 of the trial period at no extra cost. If you haven’t unboxed the mattress and you’d like to return it before day 30, you’ll need to pay a 25% restocking fee. After the 100-day trial, the return policy expires.

To return or exchange your mattress, reach out the Nest Bedding customer service team at or fill out the form on their returns page. They’ll guide you through the process. 

After the return of your original mattress is approved, the team will help you arrange for a donation service to pick up the mattress. Just send your donation receipt to Nest Bedding, and they’ll issue your full refund.

*The Nest Bedding return policy may not apply to mattresses bought from Amazon.

Is It the Right Bed for Your Kid?

The Big Kid Bed mattress is a great choice for your growing child. The firm feel promotes healthy spinal alignment, the foam construction provides a cozy feel, and the lifetime warranty ensures that you’ll have a mattress that lasts until your child becomes a teen. The cost may be a bit too high for budget-conscious shoppers. In that case, the Allswell mattress is a lower cost alternative.

See How Big Kid Bed Compares

The Big Kid Bed mattress is one of the simplest beds offered by Nest Bedding. A close comparison would be the Love & Sleep mattress, which is available in medium and firm options that provide excellent pressure relief.

The Purple Kids mattress has a medium feel, compared to the Big Kid Bed’s firm feel, and can hold up to 115lbs. It’s only available as a twin mattress. While it also has a 100-night trial period, it only has a 10-year warranty

The hybrid Saatva Youth mattress can be flipped to a medium-firm side geared toward kids aged 3–7 or a slightly firmer side for kids between the ages of 8–12. It comes with a 120-night trial period, 15-year warranty, and free white glove delivery, although returns are $99.

Other Products From Nest

nest easy breather pillow product

Easy Breather Pillow: A plush pillow with an adjustable fill level. $119/queen size

The COOL. Mattress Protector: Waterproof, breathable, and machine-washable, $109/twin size

Certified Organic Crib Mattress: Available as a hybrid latex or all latex mattress, $699

Nest Bedding Organic Cotton Luxury Sheet Sets: Made with GOTS certified organic cotton; available in ivory, white, and blue; $159/queen size


We highly recommend using a breathable, waterproof mattress protector. There are lots of affordable options on the market that will keep liquids, dead skin cells, and dust mites away from the mattress.

Nest Bedding recommends using a mattress bag to keep dirt, liquids, and pests away from your mattress. It also prevents other items from snagging on the mattress cover. All foam mattresses —like the Big Kid Bed—can be folded up or placed vertically in your moving truck.

By clicking on the product links in this article, Mattress Advisor may receive a commission fee at no cost to you, the reader. Read full disclosure statement.

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