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COOLMI

Twin Mattress, 12 Inch Hybrid Memory Foam Mattress in a Box, Pressure Relief for Back Support, Medium Firm, Individually Pocket Springs, 100-Night Trial & CertiPUR-US Certified, Twin Size, White

  • Based on 39 reviews
Condition: New
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$142.99 Why this price?
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Availability: Only 5 left in stock, order soon!
Fulfilled by Amazon
Arrives Sunday, May 17
Order within 17 hours and 8 minutes
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Size: Twin


Style: 12"


Features

  • COMFORTABLE SUPPORT: Twin size mattress use a unique combination of pocketed coils and gel memory foam with 6 times more motion isolation than traditional springs to support the natural curves of the spine, relieve pressure, and promote better sleep positions. Reinforced edge support enhances durability and stability for mattress twin.
  • BREATHABLE & HEALTHY: COOLMI twin hybrid mattress are made from premium fabrics that are skin friendly, comfortable, and breathable, with layers of gel memory foam and carefully designed pocketed spring gaps for twin size mattress in a box optimal airflow and reduced heat retention for a cool, comfortable night's sleep.
  • MOTION ISOLATION & MEDIUM FIRMNESS: The 12 inch twin mattress is built with high quality pocketed coils and high density foam to provide the perfect combination of softness and support, medium firm mattress twin effectively releases pressure and relieves fatigue while absorbing noise and vibration for a calmer, undisturbed night's sleep.
  • CERTIPUR-US CERTIFIED: Enjoy a comfortable, healthy night's sleep on a fresh, odor free mattress with this twin matress made of CertiPUR-US certified premium foam that is free of harmful substances and fiberglass, suitable for all people (including pregnant women and children),twin spring mattress allows you to use it with peace of mind, providing better sleep for you and your family.
  • HASSLE-FREE PURCHASE: Twin bed mattress is compressed and packaged in a box that requires no complicated assembly. After unpacking, please wait a while for it to fully unfold.COOLMI Hybrid memory foam mattress fits most bed frames. If you have any questions, please feel free to contact our customer support team!

Brand: COOLMI


Size: Twin


Product Dimensions: 75"L x 39"W x 12"Th


Item Weight: 30 Pounds


Item Firmness Description: Medium


Top Style: Euro Top


Cover Material: Cotton


Number of Layers: 3


Fill Material: Gel Memory Foam, High Density Foam


Weight Limit: 600 Pounds


Item Firmness Description: Medium


Number of Layers: 3


Weight Capacity Maximum: 600 Pounds


Additional Features: Breathable, Durable, Pocketed Coil, Pressure Relief, Temperature Regulating


Mattress Coil Type: Pocketed Coil


Construction Type: Hybrid


Size: Twin


Item Dimensions L x W x Thickness: 75"L x 39"W x 12"Th


Item Weight: 30 Pounds


Item Dimensions: 75 x 39 x 12 inches


top-style: Euro Top


Color: White & Gery


Style Name: 12"


Brand Name: COOLMI


Age Range Description: Suitable for all ages


Manufacturer: COOLMI


Included Components: mattres


Cover Material: Cotton


Fill Material: Gel Memory Foam, High Density Foam


Product Care Instructions: Hand Wash Only


Mattress Comfort Layer Material: Gel Memory Foam


Material Type: Cotton, Gel Foam, Memory Foam, Polyester


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, May 17

Yes, absolutely! You may return this product for a full refund within 90 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Really great product
Size: Twin Style: 12"
Bought this for an extra bed on our First floor for a surgery recovery and the Matress is so comfortable. The Matress is soft while still being firm. The edges are strong and don’t collapse when you sit on it. The price is fabulous for the quality.
Reviewed in the United States on February 26, 2026 by Ann E
    • Great bed!
Size: Twin Style: 12"
I recently bought this for my 16 yr old daughter and she has no complaints at all. Very comfortable. Great bed!!!
Reviewed in the United States on March 26, 2026 by ROXANNE COOPER
    • true to size
Size: Twin Style: 12"
mattress great for the price very comfortable
Reviewed in the United States on March 21, 2026 by john schlecht
    • Firm, Comfortable, and Surprisingly Thick!
Size: Twin Style: 12"
Review Image by Imunah Yahwah
Review Image by Imunah Yahwah
I’m really happy with this twin mattress so far! It’s firm but still very comfortable and supportive — the perfect balance. I also love how high and thick it is, especially considering how compact it was when it arrived in the package. It expanded quickly and didn’t take long at all to fully take shape. My daughter has only had it for a couple of weeks, but it already feels sturdy and durable. Definitely a great buy! ... show more
Reviewed in the United States on January 29, 2026 by Imunah Yahwah
    • Great value
Size: Twin Style: 12"
Great value
Reviewed in the United States on March 22, 2026 by SAMIR
    • very nice.
We bought this for my elderly mother who quite often spends the night. It is just right and she loves it.
Reviewed in the United States on March 8, 2026 by Scruffy
    • Comfortable mattress
Size: Twin Style: 12"
It's comfortable, and that's all you need I guess. I haven't slept on it, but I did try it out. My mom hasn't complained about it at all, so it must be comfy for her. She's almost 90. The only thing I noticed is one end of the mattress dips a little. It must not have expanded like the rest. But that's not major. It otherwise expanded quickly and there was no odor. ... show more
Reviewed in the United States on April 6, 2026 by T. Tkach
    • Not enough memory foam to deserve to be called a hybrid mattress
Size: Twin Style: 12"
This thing is absolute garbage -- do not buy. The "memory foam" as far as I can tell is maybe a centimeter tall. You can see the springs through it! It is hard as a rock, might as well sleep on the floor.
Reviewed in the United States on January 4, 2026 by Andrew

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