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Kids' Twin Mattress

6 Reviews

Breathable & Washable

Introducing the coolest, most comfortable sleep for your big kid. Did you know that young children can’t properly thermoregulate? Our ultra-breathable twin-sized mattress features patented Wovenaire® technology and firm support for growing bones — allowing them to sleep cooler and better. Completely washable from cover to its 3-piece core, designed for easy cleanup when messes happen. Ideal for asthma and allergy sufferers, too!

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Frequently Bought Together

  • Temperature Regulating

    Unsurpassed breathability means your child will enjoy cooler, deeper sleep — all night long.

  • Completely Washable

    Washable cover + the ONLY kids’ mattress with a 3-piece washable core. Easy cleanup of messes, dust mites and allergens!

  • Better Sleep for Big Kids

    Optimal levels of comfort, air circulation and firm support for growing bones.


Your donation will help us provide diapers, safe sleep spaces, and more essential items to children living in poverty through the non-profit organization Baby2Baby.

Perfect for potty training! Designed to bring clean, hypoallergenic, lasting comfort to the big-kid bed.

Extra plush, ½" thick cushiony cover is fully breathable for a cooler night’s sleep — and is machine washable.

90% air, 10% food-grade polymer and more breathable than leading organic, foam and coil mattresses. Provides optimal firmness for your not-so-little one.

Our mattress is independently tested and certified for low chemical emissions, exceeding the highest industry emissions safety standards to help improve indoor air quality.

The Reviews Are In

We're providing peace of mind — for bedtime and beyond.


“Extremely easy to assemble and take apart to wash. My daughter kept laying on it and saying "cozy" because it is truly such a comfortable and quality mattress.”

From Pacifica, CA

Megan R

“Aside from the safety aspects of the mattress, it's extremely easy to assemble. It’s super lightweight for a twin bed & the cover is very easy to get on and off when it’s time to wash. I think Newton has outdone themselves with this mattress!”

From Arizona

Leslie K.

“He slept great, woke up happy and ready to play. I rested a bit easier knowing that the transition was much less painful than I had ever anticipated.”

Lexington, KY


“So far, it's surpassed all of my expectations. Our son doesn't wake up sweating anymore, and he falls asleep faster too! I wish we knew about Newton earlier!”

Oceanside, NY

Vivian M.

“Great mattress for my daughter. Fits perfectly in her twin bed frame and great quality. I love that the entire thing can be washed/cleaned.”

Milton, MA

Product Details


  • Breathe-thru Wovenaire® Core
  • Removable, machine washable cover
  • Core arrives in 3 pieces and cover ships separately. Easy cleaning and assembly.
  • GREENGUARD Gold Certified
  • Twin Mattress measures 38” x 75” x 5.5”
  • Use sheets with an 8" pocket for a snug fit
  • Low profile makes it ideal for bunk beds and trundle beds!

Testing & Certification

Newton Baby products have been independently tested and certified by UL to meet GREENGUARD Gold standards for the lowest chemical emissions. The standards are among the most rigorous in the world to test for the lowest measurements of chemical emissions such as VOCs, and certifies that Newton products help to promote a healthier indoor air quality. With Newton, you can rest assured your child is sleeping safely.

Shipping & Delivery

  • Ships FREE* in 1-2 business days


  • Ships via FedEx
  • Transit time: 3-7 days once shipped
  • Free Shipping in the contiguous 48 states
  • Shipping fee to HI & AK calculated at checkout based on zip code

Return & Exchanges

Return Policy

  • 100-night trial with a full money-back guarantee.

Warranty Policy

  • 10-year limited warranty
  • Accidental Coverage available with Mulberry

Care & Use

Washing the Cover:

  • Unzip prior to wash & dry
  • Machine wash cold, alone, with detergent
  • To refresh, add ½ cup baking soda to wash
  • Tumble dry low thoroughly on low heat setting
  • Do NOT hang dry

Washing the core:

  • Hand rinse cold (in shower or tub)
  • Use mild detergent
  • Shake then air or fan dry
  • Avoid heat or direct sun
  • Spot clean as needed


  • Cover and core ship separately. Ensure receipt of both boxes.
  • Unroll cover (arrives unzipped as top and bottom layers) and set top cover aside
  • Lift side walls of bottom cover into a box shape
  • Fit all 3 core segments inside, making certain that all
    edges (especially the top edges) align flush against each other (no
    bumps or spaces in between)
  • Place top cover over assembled bottom cover and core
  • Zip closed, tucking front flap in between core and side walls


Will the Kids' Mattress fit my bed frame?

The mattress is designed to fit all traditional twin bed frames. It measures 38” x 75” x 5.5”.

Are there flame retardants?

While many of our competitors use toxic chemical fire retardants, we do not. Instead, we use a layer of viscose material sewn into our cover. Viscose material is made from reconstituted wood pulp. We quilt this material into our mattress covers for a safer, non-toxic solution.

Is the mattress comfortable for my child?

Our Kids' mattress is made with the same technology and comfort that Newton is known for in our crib mattresses. Many parents tell us their little ones start sleeping better from the first night, and we couldn’t be happier. Try it yourself risk-free with our 100 night trial.

Can I lay on this with my child?

We know how bedtime can be during the toddler and preschool years (“Just one more book?”). That said, this mattress is specifically designed for kids up to 100lbs. We don’t recommend that adults sleep on the mattress as it could impact the integrity of our patented Wovenaire® core. So snuggling together on the kids' mattress for one more book at bedtime is fine, however, a longer duration of sleeping on it is not recommended for parents.

What sheets should I use?

We recommend using a cotton sheet for the most comfortable and breathable sleep for your child. Because our mattress is 5.5" thick, it's best to find sheets with an 8" pocket to fit snuggly on the mattress.

100-Night Free Trial

Try the Newton Crib Mattress for 100 nights risk-free to decide if it's right for you and your baby. If either of you aren’t happy, simply return at our expense for a full refund.



Top 3 Kids' Twin Mattress Questions

Our Kids’ Mattress is not waterproof, however, the cover is water resistant and the entire mattress is washable from cover to core! The removable cover can go into the washing machine and the core can be washed in the bathtub or shower! The core comes in 3 sections to make washing only the soiled area even easier.

You can certainly use a mattress pad! We make a breathable, waterproof mattress pad that fits just like a fitted sheet and makes quick changes easy to manage when accidents happen.

Kids are messy and we all know accidents happen! Our unique unique cover-to-core washability ensures that — no matter the mess — your big kid will have the cleanest night’s sleep, guaranteed!