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Firm 14 Inch King Mattress, Hybrid Mattress King Size for Cooling Comfort & Back Pain Relief, CertiPUR-US Certified Mattresses in a Box, 365 Nights Trial, 10 Years Warranty - Fiberglass Free

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Availability: In Stock.
Fulfilled by VISCOFLEX

Arrives Wednesday, May 13
Order within 11 hours and 17 minutes
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Color: Navy Blue


Size: King


Set name: 14" Firm


Features

  • Firm King Hybrid Mattress / 14 Inch King Size Mattress / Firm Hybrid Mattress King for Lumbar Support & Pain Relief
  • Optimal Firmness Where You Need It - Hundreds of high-compression springs adapt to your body's unique curves, delivering targeted support and pressure relief. Reinforced with industrial-grade steel, these springs hold their shape for years of use. So you wake up without stiffness - just refreshed, balanced comfort
  • Motion Isolation for Undisturbed Sleep - Sleep soundly through any movement with the advanced pocketed coils. This independent spring design absorbs 83% of motion before it reaches your side of the bed, creating a personal sleep zone that stays perfectly still - no matter how much your partner moves
  • Breathable Mattress King Size - Unlike all-foam mattresses that trap heat, this coil-and-foam hybrid mattress combines responsive coils with premium foam layers to promote continuous airflow. The open structure of the hybrid system acts like tiny ventilation channels, helping you stay comfortable throughout the night
  • Ideal Spinal Alignment for All Positions - Engineered to maintain optimal spinal alignment all night, this king mattress caters to all sleep positions. Side sleepers enjoy perfect cushioning for shoulders and hips, back sleepers receive enhanced lumbar support, while combination sleepers experience effortless transitions - all for deeper, restorative rest
  • Fiberglass-Free, Certified Materials - Worried about chemicals in your mattress? VISCOFLEX 14-inch mattress king contains no fiberglass or off-gassing. With ultra-low VOCs that meet strict CertiPUR-US standards, it lets you breathe easy and sleep safe with your family
  • About VISCOFLEX - Certified by CertiPUR-US and OEKO-TEX, VISCOFLEX king size mattresses are crafted to offer lasting comfort and peace of mind. Enjoy a 365-night home trial and 10 years of coverage, with dedicated sleep consultants ready to support you every step of the way

Brand: VISCOFLEX


Size: King


Product Dimensions: 80"L x 76"W x 14"Th


Item Weight: 111.5 Pounds


Item Firmness Description: Firm


Top Style: Euro Top


Fill Material: Firm Mattress with Gel Memory Foam & Pocket Springs


Special Feature: Targeted Lumbar Hip & Shoulder Support, Reinforced Edge Support, Advanced Motion Isolation, Pressure & Pain Relief, Temperature Regulation, Skin-Friendly & Breathable, Fire-Retardant & Fiberglass-Free, Non-Toxic & Odorless See more


Color: Navy Blue


Coil Type: Pocketed Coil


Item Firmness Description: Firm


Additional Features: Targeted Lumbar Hip & Shoulder Support, Reinforced Edge Support, Advanced Motion Isolation, Pressure & Pain Relief, Temperature Regulation, Skin-Friendly & Breathable, Fire-Retardant & Fiberglass-Free, Non-Toxic & Odorless


Mattress Coil Type: Pocketed Coil


Construction Type: Hybrid


Size: King


Item Dimensions L x W x Thickness: 80"L x 76"W x 14"Th


Item Weight: 111.5 Pounds


Item Dimensions: 80 x 76 x 14 inches


Item Depth: 14 inches


Fill Material: Firm Mattress with Gel Memory Foam & Pocket Springs


Mattress Comfort Layer Material: Gel Memory Foam


Material Type: Hybrid Mattress with Gel Memory Foam & Pocket Springs


top-style: Euro Top


Color: Navy Blue


Style Name: Luxury


Brand Name: VISCOFLEX


Model Name: ADULT MATTRESS


Product Benefits: Back Pain Relief, Motion Isolation, Temperature Regulation, Spinal Alignment


Model Number: P2503221


Manufacturer: VISCOFLEX


Set Name: 14" Firm


Manufacturer Part Number: P2503221


Unit Count: 1.0 Count


Included Components: King Mattress in a box


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, May 13

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Comfort and firmness
Just what I was looking for! It's perfect! Had a memory foam mattress before this and had the WORST PAIN everyday waking up... had been looking and looking, Finally found this mattress and I love it!!!
Reviewed in the United States on March 19, 2026 by April King

  • Would buy again
Daughter LOVES this mattress. amazing how this expands. it is very firm which is what she wanted.
Reviewed in the United States on April 6, 2026 by RANIDAY

  • Love , love love!!
Color: Navy Blue Size: King Set name: 14" Extra Firm
I did not wait for the required 3 days to fully expand. However , out the box I’m so satisfied with this purchase. It feels amazing and out the box it’s everything I wanted when investing in a new mattress. Highly recommend.
Reviewed in the United States on April 24, 2026 by Sonia Kirkland

  • The Best Mattress!
Excellent firmness, comfortable support! This mattress is high-quality, and is an excellent choice for someone with back pain! I highly recommend this mattress!
Reviewed in the United States on January 26, 2026 by Perry Staszko

  • Really comfortable and affordable
Really comfortable and affordable.
Reviewed in the United States on February 8, 2026 by Maria

  • Back pain relief now sleeping on this ultra firm mattress.
The ultra firm mattress has improved my sleep and has helped relieve back pain. Reasonably priced and appears to be high quality for the price.
Reviewed in the United States on February 21, 2026 by Mike

  • Decent mattress for those who like firm with a little softness
Pretty firm, but better than the spring mattress we had before. It’s got some spring in it from what I can tell, but it doesn’t hurt my back like the old one did. When unpacking be careful because it can flop out and whack you in the face. So be sure to open it where it’ll pop up away from you. It does puff up a bit after you let it sit out for a day or two. Adds to height which I like. Comfortability: 3.5/5 Softness: 2/5 Firmness: 4/5 Overall: 4/5 ... show more
Reviewed in the United States on January 6, 2026 by Ichigo Mew

  • Mattress in a box
I had never bought a mattress delivered in a box before. But I needed a replacement mattress in a hurry so….. Turns out this was an easy fix for me. The price of this mattress was a plus compared to buying one at a store. Very comfortable and supportive. Due to the weight of the mattress my son brought it into my home and set it up for me. After letting the mattress expand for a few days it was easy to make up the bed. The only negative would be not being able to test out the firmness of the mattress before buying. ... show more
Reviewed in the United States on November 5, 2025 by Becky Gilchrist

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