FATHOM Medium Twin XL Mattress 12 Inch Memory Foam Mattress Bed in a Box for Back Pain Relief and Cool Sleep with Gel Foam and Removeable Fiberglass Free Cover, CertiPUR-US Certified
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FREE 90-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Sunday, Jun 7
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Size: Twin XL
Style: 12 Inch
Pattern Name: Medium
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 mattress is free from harmful substances. Backed with a 10-year protection, Fathom 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 XL
Product Dimensions: 80"L x 38"W x 12"Th
Item Weight: 45 Pounds
Item Firmness Description: Medium
Top Style: Gel Top
Cover Material: Polyester
Number of Layers: 4.0
Fill Material: Gel Memory Foam, Memory Foam
Special Feature: Breathable, Durable, Low Motion Transfer, Pressure Relief, Temperature Regulating
Product Dimensions: 80 x 38 x 12 inches
Item Weight: 45 pounds
Manufacturer: FATHOM
Item model number: Medium 12 TXL
Date First Available: April 23, 2025
Age Range Description: Adult
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Jun 7
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Size: Queen (U.S. Standard)
Style: 10 Inch
Pattern Name: Medium
Honestly, I was pleasantly surprised by this mattress. It has a medium firmness that feels very comfortable—not too hard and not too soft. I’ve been sleeping better since using it, and my back definitely feels better in the mornings. It also stays cool during the night, which is a big plus for a memory foam mattress. I really like that it’s fiberglass-free and CertiPUR-US certified, which gives me peace of mind. It arrived neatly packed in a box, was easy to set up, and expanded quickly. The removable cover is convenient and easy to wash. Overall, it feels well made and is a great value for the price. I would definitely buy it again.
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Reviewed in the United States on December 17, 2025 by Yamileth
Size: Queen (U.S. Standard)
Style: 10 Inch
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This Fathom Medium Queen Mattress is a 10-inch memory foam mattress designed for comfort, support, and cooler sleep. It features gel-infused foam that helps regulate temperature while relieving back pain and pressure points. The medium firmness offers a balanced feel, suitable for most sleeping positions. Conveniently packaged as a bed-in-a-box, it is easy to set up. The removable cover is fiberglass-free for safer use. CertiPUR-US certified materials ensure durability and low emissions. Ideal for everyday comfort, this mattress combines support, cooling, and quality for restful, healthy sleep.
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Reviewed in the United States on January 11, 2026 by Juanderlie Josema Juanderlie Josema
Size: Queen (U.S. Standard)
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The media could not be loaded. This mattress is comfortable and has solid support. The 14-inch height gives it a nice feel, not too soft and not too firm. The gel foam helps keep things cooler at night, and it doesn’t trap heat like some memory foam beds do. It comes out of the box easy, expands quick, and the cover is clean and simple with no fiberglass mess. If you need a mattress that relieves pressure and still feels supportive, this one does the job well. Good sleep without spending a fortune.
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Reviewed in the United States on January 13, 2026 by James Williams
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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.
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Reviewed in the United States on January 17, 2026 by jaqueline torres
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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!
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Reviewed in the United States on December 15, 2025 by Miles G
Size: King (U.S. Standard)
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Super comfy, cool and no smells. A heads up that it can take up to 72 hours to attain actual mattress height.
Reviewed in the United States on January 31, 2026 by m ledwell
Size: Queen (U.S. Standard)
Style: 12 Inch
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I’m really impressed with this mattress. It’s extremely comfortable and surprisingly spacious, perfect for relaxing or sleeping without feeling crowded. The top layer feels soft and plush, while the lower layers provide great support, so you get the perfect balance of comfort and firmness. Since I started using it, I’ve been waking up without any back pain and feeling much more rested. It doesn’t sink, it doesn’t wobble, and it keeps its shape beautifully. Even with two people on the bed, it feels stable and roomy. The quality is excellent as well — the materials feel premium, and the overall look is very clean and modern. This mattress works great
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Reviewed in the United States on January 26, 2026 by jeff
Size: Queen (U.S. Standard)
Style: 12 Inch
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I’ve been sleeping on the FATHOM Medium Queen 12-Inch Memory Foam Mattress for several weeks now, and it has made a noticeable difference in my sleep quality. The medium firmness is a great balance between support and comfort. It contours nicely to the body without that “sinking” feeling, and my lower back feels much more supported compared to my old mattress. I wake up with far less stiffness and soreness. The mattress stays surprisingly cool throughout the night, even during warmer evenings. I also really appreciate the removable, fiberglass-free cover, which feels soft, breathable, and is easy to clean. Setup was simple, right out of the box and fully expanded within a day. No strong chemical smell, just a very faint “new mattress” scent that disappeared quickly.
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Reviewed in the United States on January 14, 2026 by Tracy Truong