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FATHOM

FATHOM Firm Twin Mattress 8 Inch Memory Foam Mattress Twin Size Bed in a Box for Back Pain Relief and Cool Sleep with Gel Foam and Removeable Fiberglass Free Cover, CertiPUR-US Certified

  • Based on 492 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Jun 6
Order within 1 hour and 40 minutes
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Size: Twin


Style: 8 Inch


Pattern Name: Firm


Features

  • Advanced Cooling Comfort: The AeroFusion gel memory foam mattress ensures exceptional breathability and heat dissipation, adapting precisely to your bodys contours while resisting temperature sensitivity. Enjoy cool, cradling comfort no matter the season.
  • Premium, Thoughtful Design: Wrapped in a soft, geometric-patterned jacquard fabric with stylish light gray graphene yarn borders. The fiberglass-free mattress cover is not only elegant but functional, featuring a zipper for easy removal and cleaning.
  • Motion Isolation Technology: Dynamic memory foam mattress contours to your bodys unique curves, filling gaps to support optimal spinal alignment while effectively lowering motion transfer and noise, ensuring a serene and undisturbed sleep environment where everyone wakes up refreshed, ideal for couples and kids.
  • Certified Safe Material: Crafted in the USA with CertiPUR-US foams and globally sourced Oeko-Tex certified fabrics, our twin mattress is free from harmful substances. Backed with a 10-year protection, this 8 inch mattress is designed to promote spinal health and long-term durability for a healthy lifestyle.
  • Effortless Setup: The Fathom mattress in a box is vacuum-packed, compressed and rolled for easy movement and installation. Simply open and unroll your memory foam mattress, then enjoy it within 72 hours for full expansion.

Brand: FATHOM


Size: Twin


Product Dimensions: 75"L x 38"W x 8"Th


Item Weight: 31 Pounds


Item Firmness Description: Firm


Top Style: Gel Top


Cover Material: Polyester


Number of Layers: 3


Fill Material: Gel Memory Foam, Memory Foam


Weight Limit: 750 Pounds


Item Firmness Description: Firm


Number of Layers: 3


Weight Capacity Maximum: 750 Pounds


Additional Features: Breathable, Durable, Low Motion Transfer, Pressure Relief, Temperature Regulating


Construction Type: Memory Foam


Size: Twin


Item Dimensions L x W x Thickness: 75"L x 38"W x 8"Th


Item Weight: 31 Pounds


Item Thickness: 8 Inches


Item Dimensions: 75 x 38 x 8 inches


Item Depth: 8 inches


Cover Material: Polyester


Fill Material: Gel Memory Foam, Memory Foam


Mattress Comfort Layer Material: Comfort Foam


Material Type: Gel Foam, Memory Foam


top-style: Gel Top


Color: Firm


Style Name: 8 Inch


Brand Name: FATHOM


Model Name: Fathom 8" T


Product Benefits: Back Pain Relief, Improves Sleep, Pressure Relief, Reduces Toss & Turn, Stress Relief


Model Number: Firm 8 T


UPC: 840418683644


Mattress Type: Standard Mattress


Manufacturer: FATHOM


Set Name: Fathom Twin


Manufacturer Part Number: FA8TFRT


Included Components: Memory Foam


Age Range Description: Kid


Item Type Name: Bed Mattress Conventional


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Jun 6

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.

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  • 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

    • Super comfortable!!
Size: Queen (U.S. Standard) Style: 10 Inch Pattern Name: Medium
The FATHOM Medium Queen Mattress 10 Inch Memory Foam is amazing! It arrived quickly, was easy to set up, and expanded perfectly. The memory foam provides just the right balance of support and softness. I’ve been sleeping really well. Recommend for anyone looking for a quality, comfortable mattress at a great price ... show more
Reviewed in the United States on December 24, 2025 by Akim Masters
    • Cool and Comfortable Sleep
Size: Queen (U.S. Standard) Style: 10 Inch Pattern Name: Medium
I’m really impressed with this Queen Mattress. It arrived neatly packed and expanded quickly with no strong odor. The medium firmness is perfect, supportive enough to help relieve my back pain while still feeling comfortable and cushioning. I also sleep hot, and the gel foam actually makes a noticeable difference in keeping the mattress cool through the night. The removable, fiberglass-free cover is a big plus for peace of mind and easy cleaning. Great quality for the price, and being CertiPUR-US certified makes it even better. Highly recommend! ... show more
Reviewed in the United States on December 15, 2025 by Miles G
    • Great Mattress
Size: Queen (U.S. Standard) Style: 12 Inch Pattern Name: Medium
The FATHOM Medium Queen Mattress is incredibly comfortable and supportive. The 12-inch memory foam provides excellent back pain relief while still feeling perfectly balanced. The gel foam keeps the mattress cool throughout the night, and the removable fiberglass-free cover adds peace of mind. Easy to set up and high quality—great value for restful, pain-free sleep. ... show more
Reviewed in the United States on December 23, 2025 by Yba
    • Great mattress
Size: Queen (U.S. Standard) Style: 10 Inch Pattern Name: Medium
I bought this for my son and have completely taken over his bed. The mattress arrived in a fairly small box compressed. It didn’t take long after opening for the mattress to expand. It was easy to set up. And for someone that is 9 months pregnant and even sleeping has been uncomfortable and painful.. The mattress itself is extremely comfortable and has helped me to sleep through the night! This is the perfect medium mattress that is supportive but not too hard and not too soft. It has been amazing and I’m not waking up from hip and back pain anymore. It also is very breathable and not like other memory foams that retain a lot of heat. ... show more
Reviewed in the United States on December 21, 2025 by Cait
    • Highly recommended for everyone looking to sleep better
Size: Queen (U.S. Standard) Style: 12 Inch Pattern Name: Medium
I recently upgraded to a 12-inch queen foam mattress, and it has truly transformed my sleep experience. From the moment I first lay down, I could tell this mattress was something special. What stands out most is the perfect balance of support and comfort. The foam is firm enough to keep my spine aligned — my lower back pain has noticeably improved — yet soft enough to cradle pressure points and relieve tension. I’ve woken up feeling refreshed and pain-free, which hasn’t happened in years with my old mattress. Another highlight is how cool and breathable this mattress sleeps. Even on warm nights, I stay comfortable without overheating. The foam layers are designed to promote airflow, so I never wake up sweaty like I used to with other memory foam beds. Comfort-wise, it’s truly luxurious. It gently contours to your body, giving that “just right” feeling — not too stiff, not too plush. Whether I’m on my back, side, or stomach, it adapts perfectly and feels supportive without being restrictive. In short, if you’re looking for a high-quality queen mattress that’s excellent for back support, incredibly comfortable, and refreshingly cool, this 12-inch foam model is a stellar choice. It’s been one of the best sleep investments I’ve ever made — I wake up happier, healthier, and ready to take on the day! ... show more
Reviewed in the United States on January 5, 2026 by Dayana
    • Very firm
Size: Full Style: 6 Inch Pattern Name: Firm
We found it to be very firm. Too firm for our tastes. We ended up adding a 1.5" memory foam topper and a quilted mattress pad. After those additions it was super comfortable.
Reviewed in the United States on January 8, 2026 by Dave Varberg
    • Mattress
Size: Full Style: 6 Inch Pattern Name: Firm
It provides good support and has helped reduce back pain. There is no uncomfortable sinking, and the mattress maintains its shape well. Heat retention is minimal, so it stays comfortable throughout the night. Motion transfer is also very low, making it a great choice for restful sleep. Overall, excellent quality and value. ... show more
Reviewed in the United States on December 25, 2025 by Sai Avinash
    • Best quality
Size: Queen (U.S. Standard) Style: 10 Inch Pattern Name: Medium
The mattress arrived well packaged and expanded to full size quickly after unboxing. It provides a comfortable medium feel that offers good support while still relieving pressure on the back. The gel memory foam helps regulate temperature and stays cool through the night. The removable cover is a nice touch and feels soft and breathable. Overall, it offers solid comfort and quality for everyday sleep ... show more
Reviewed in the United States on January 12, 2026 by Amish

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