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Kolcraft Pure Sleep Therapeutic 150 Crib Mattress

4.3 out of 5 stars 195 customer reviews
| 14 answered questions
About the Product
  • 150 heavy gauge steel coils for firm support while your baby sleeps and grows
  • Waterproof cover and lock-stitched waterproof binding resists stains, moisture and mildew - entire mattress wipes clean with a damp cloth for a sanitary sleeping surface
  • GREENGUARD® Children & Schools certified for indoor air quality and low chemical emissions to help create a healthier sleeping environment for your baby.
  • Meets or exceeds all flammability, lead, phthalate and CPSIA testing and does not contain toxic fire retardants
  • Made in the USA and offers a 10-year warranty on workmanship and materials
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Frequently Bought Together

  • Kolcraft Pure Sleep Therapeutic 150 Crib Mattress
  • +
  • American Baby Company Waterproof Fitted Crib and Toddler Protective Mattress Pad Cover, White
  • +
  • Summer Infant Contoured Changing Pad (16.5" x 32.5")
Total price: $97.89
Buy the selected items together

Product Description

Product Description

Crib Mattress Buying Guide

A crib mattress is an essential purchase for your baby. One of the most important things caregivers can do for newborns is to provide them with a safe sleeping environment. To help reduce the risk of suffocation, SIDS (Sudden Infant Death Syndrome) or SUID (Sudden Unexpected Infant Death), a properly assembled crib and proper fitting crib mattress should be used without toys, blankets, pillows or corded electronics in or near an infant’s sleeping space.

Choosing the right crib mattress for your baby can require a bit of research as there are many to choose from. Purchasing a new crib mattress is best instead of second hand. You don’t know how the previous owner used or stored the product. Plus crib mattresses available today are made to the latest standards.

Crib mattresses are designed to fit inside USA standard size cribs and toddler beds. Each crib mattress will fit inside a 52” x 28” crib (with plus or minus dimensions) and are no thicker than 6” measured from seam to seam. Find information about crib fit and measuring the inside dimensions of your crib to help ensure a snug fit for your crib mattress. You can purchase two-stage models which offer a firmer side for infants and a softer side for toddlers.

Focus on the 4 C’s of a Crib Mattress to help you decide: Core, Cushioning, Cover and Certifications

Core Types

Innerspring Crib Mattresses

Innerspring coils are made of steel and are heat-tempered, which means the coils will bounce back into shape easily. For the best type of innersprings, look for a higher coil count, which means the coils are closer together, helping to create a firmer surface overall.

Upgraded innerspring models include border wire or border rods, which is thick steel wrapped around the edges to keep them supported. Additional features include weight distribution systems, cross frames and corner and side protectors, like pylons, which help to make the core more durable, firmer and supportive.

The great thing about steel coil innersprings is that they last a lifetime and you can find high-quality innerspring coils from affordable models to premium crib mattresses. Coil crib mattresses will weigh between 10 and 20 pounds depending on the interior core and cushioning. Anything much heavier than this is the exception, not the norm, for crib mattresses, as you want to easily be able to lift and change crib sheets.

Foam Crib Mattresses

A high-density polyurethane foam core that is at least 1.5 pounds per cubic foot. The higher the number of pounds per cubic foot, the firmer the core. Premium foam models include soybean enhanced foam cores made with CertiPUR-US Certified foam, which have been tested for durability and chemicals.

Some crib mattresses use a polyester material that are not considered high-density, but are more affordable models for short term use. New ultra-firm and ultra-lightweight models include polyethylene foam, which can weight around 5 pounds. Quality high-density foam crib mattresses typically weigh between 8 and 13 pounds making it easier to lift and change crib sheets and crib mattress pads.

Cushioning Types

Cushioning inside crib mattresses offer your child comfort, firmness and some can even offer a cooling effect! Hypoallergenic cushioning like polyester, cotton, organic cotton, memory foam, and new innovations like soybean cool gel foam are popular materials used inside baby’s crib mattresses. These materials are more popular and preferred over heavy coconut coir or gray ortho pads. One thing to note about organic cotton is that organic materials or covers can be used, although the entire crib mattress is not made of organic material.

Cover Types

A waterproof and easy-clean crib mattress surface is the most important thing to look for. Despite added protection from crib mattress pads, you want to be sure that the mattress cover and binding is waterproof to avoid liquids from seeping inside the crib mattress, which can cause mold and bacteria build up.

Vinyl laminate covers are the most popular because of their durability and easy-clean surfaces that don’t allow leaks to seep through at all. If you have any concerns about vinyl covers just look for the GREENGUARD Certification, which means the crib mattress has been tested for chemical emissions and is safe for use with infants. Upgraded crib mattresses can include a hospital-grade antibacterial cover to help keep germs from spreading on a crib mattress surface.

Many premium crib mattress covers include woven fabrics and soft cotton cloth. These fabrics are treated with safe waterproofing and stain-resistant materials while giving your child a softer, more breathable material on a premium crib mattress.


The key certification to look for is GREENGUARD Gold Certified crib mattresses, formerly known as GREENGUARD Children & Schools Certification, which measures the chemical emissions from the mattress. If a crib mattress has been certified, this means an outside laboratory tested it to see whether it poses any air-quality risk to your baby. The materials including the core, cushioning and cover are tested. CertiPur-US is a seal found on high-density polyurethane foam sourced from companies who comply with a high-quality foam without hazardous materials.

From the Manufacturer

Established in 1946, Kolcraft is a family-owned business that built its history by manufacturing sturdy and safe crib mattresses parents have depended on for decades. The Kolcraft Pure Sleep Therapeutic 150 crib and toddler bed mattress is the next step up to the Kolcraft Pure Sleep Therapeutic 80 crib mattresses with an increased coil count of 150, which means the coils are closer together to provide a firmer foundation. Built with an 150 heavy gauge coils interwoven for durability and support and thick hypoallergenic all-around support wrap that provides a firm foundation baby doesn't feel the coil and stays comfortable and supported for years. The embossed reinforced waterproof cover is hypoallergenic and designed with waterproof binding so the entire surface can be cleaned with soap and water. The natural airflow pocket keeps the mattress fresh without the use of small metal vents. Measures 51.625 x 27.25 x 5 inches and fits both cribs and toddler bed frames. 10 year manufacturer's warranty on workmanship and materials. Meets or exceeds all flammability, lead, and phtlalate testing and does not contain toxic fire retardants.

Product Information

Technical Details
Item Weight11.6 pounds
Product Dimensions51.6 x 27.2 x 5 inches
Item model numberKM301-WGT1
Minimum weight recommendation5 Pounds
Maximum weight recommendation99 Pounds
Number of items1
Batteries requiredNo
Specification metcertified frustration-free
Technical Specification
  • For warranty information about this product, please click here [PDF]
Additional Information
Best Sellers Rank #2,002 in Baby (See top 100)
Shipping Weight15 pounds (View shipping rates and policies)
Domestic Shipping Item can be shipped within U.S.
International Shipping This item is not eligible for international shipping. Learn More
Warranty & Support

For warranty information about this product, please click here [PDF]

Customer Questions & Answers

Customer Reviews

Top Customer Reviews

By M. Smith on March 5, 2012
Verified Purchase
First, sizing is dead on. Says it is a standard size and it fit my crib which was also standard size (a LaJobi Nursery 101 Coconcord Classic Crib, Cherry ). No gaps between the crib and mattress to worry about.

Next, its fairly thick for a baby mattress, I know some are only a few inches thick. Makes me glad because I can see this lasting awhile.

Also, it is already a waterproof mattress. You don't need to purchase a special mattress cover for this.

My son is quick to let us know if he's uncomfortable, and his first time in the crib he just laid there and smiled. Definitely a winning mattress for me, and I guess I caught it on sale, but it was priced around $56. Best part was that with Amazon Mom, I got free two-day shipping and didn't have to pay extra for it being oversized. A great deal for a great product.
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Verified Purchase
We ordered this mattress in 2012 for our daughter. She has used this mattress for 3 years. We have been very happy with this purchase. The mattress is water proof. This is so important as in the past year our toddler became potty trained. Nighttime accidents happen, and this cover has stood the test of time. There are no tears or stitching coming loose. There is no smell or stains. The cover cleans so easily. No moisture penetrates past this barrier. We do flip and turn the mattress often. Usually several times a week. I clean with a spray antibacterial cleaner. The sheets stay on the bed - which is a miracle with a toddler who flips like a fish and plays on her bed.
My daughter is a tough toddler and this product has stood up to accidents, jumps and daily wear. I would buy this again and again if the need arises. You won't be disappointed.
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Verified Purchase
This mattress came super fast-even before the crib, which I ordered first. The mattress was very easy to get out of the box, which was the perfect size for the mattress. Once the crib arrived, which is a standard sized crib (Davinci Jenny Lind crib), I put the mattress in, and it was a perfect fit. No big gaps. The only thing I would mention is that the plastic wrap around the mattress was very dirty-as in, I got black fingers from handling it. Don't let it touch your baby bedding! Other than that, you can't beat the price and quailty of this mattress.
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Verified Purchase
I just received this mattress for my daughter. She is still in a crib right now with a different mattress but her baby brother who will be born soon is going to get the crib and mattress so we needed to get her a new mattress for her new toddler bed. I'm blown away that anyone would buy this for their baby's crib, it is way too soft. I actually thought that it would be a little firmer but then again for the price maybe my expectations were too high. I'm going to keep it because returning it would be a pain and I think it'll be fine for my toddler daughter who is 2 1/2 to use since she's NOT at risk for SIDS anymore but I would never use this mattress for a baby. The mattress that is currently in my daughter's crib is the Naturepedic No Compromise Organic 252 mattress, that mattress is very thick, heavy and firm...perfect for a newborn baby. This one will have to do for my daughter's toddler bed. I hope it holds up over time.
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By Marti on January 10, 2014
Verified Purchase
I can't even imagine purchasing a mattress that was not this brand. I love how soft the mattress is compared to most "crib" mattresses. The covering definitely assures that nothing will stain it or wet the actual bed. But I was stunned to know how truly hard some crib mattresses are. This is perfect, and after almost 4 months of sleeping exclusively in the crib, my daughter is extremely comfortable and the quality is great. I do suggest and recommend rotating it, i.e. flipping it over and turning it as well to help wear it more evenly. GREAT quality for the price!
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By sspiegal on November 18, 2013
Verified Purchase
When we got this it was too soft for our liking to use with out newborn. So we switched it for our toddlers mattress and were good to go. But if this was our first child, we would have been a little disappointed.
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Verified Purchase
My 3 year old and 9 month old both use this mattress. Keep in mind that softness is all relative. I've seen mattresses harder and softer than this and it's just about right for my tastes. It fits both the crib and toddler bed just right. My 3 year old is starting to go through the hold-your-pee-through-the-night phase and this mattress is great for those 2AM cleaning sessions. Wipe it down and put a new sheet on and your back to bed in a few minutes. Our 9 month old has also had some midnight blow-outs and sleeps well on this. I have no complaints and my 3 year old doesn't complain of aches in the morning.
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Verified Purchase
Cheap, but great...loved it while my son was little. We didn't go with a toddler bed, decided on a "big boy" bed, but used it for about 18 months. It looked brand new when I gave it to a friend of mine...I'm sure she'll be just as happy with it!
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