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Ruoysun

Ruoysun King Size Mattress, 14 Inch Medium Firm Hybrid King Mattress in a Box, Strong Edge Support, Motion Isolation, with 7-Zones Pocket Springs, Fiberglass-Free, Pressure Relief, CertiPUR-US

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Availability: 20 left in stock
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Arrives Sunday, Aug 9
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Item Firmness Description: Medium Firm


Item Thickness: 14.0 Inches


Size: King (U.S. Standard)


Features

  • Luxurious Comfort & Ergonomically Designed: Our exclusive Ruoysun 7-Zone Pocket Spring System is precision-engineered to match your body's natural curves. As you lie down, shoulders sink slightly for pressure relief, the lumbar spine receives targeted lift, and legs rest easy. A plush memory foam layer adds just enough softness on top, delivering a medium firm feel that's truly "just right" for your king size memory foam mattress whether you sleep on your back, side, or stomach.
  • Silent Motion Isolation: Over 600 individually pocket springs mean motion stays where it starts. If you're sharing your king bed mattress with your partner or pet, the motion is absorbed right where it starts. You won't feel a thing. No noise, no vibration. Light sleepers, this is your peace of mind.
  • Edge Support You Can Count On: We added 3 rows of reinforced springs around the perimeter, delivering 30% more reinforcement for lasting durability. Sit, sleep, or lounge near the edge with complete confidence, and the surface stays solid and supportive, edge to edge. The whole medium firm king mattress stays solid.
  • Say Goodbye to Hot, Stuffy Nights: Our 7-layer construction in this king size mattress medium firm includes a cooling-gel memory foam layer and ventilated comfort foams that actively wick away heat and moisture. Paired with a soft, breathable knit cover, you stay cool, dry, and comfortable with no more night sweats.
  • King Mattress in a Box: We roll and compress each Ruoysun into a box so compact, it glides through doorways and up stairs with ease. Just unbox, unroll and expand (allow 4872 hours for full shape). Every Ruoysun is built with multi-stage quality inspections, CertiPUR-US certified materials, and fiberglass-free construction. Backed by a 365-night trial and 10-year warranty.

Brand: Ruoysun


Size: King (U.S. Standard)


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


Item Firmness Description: Medium Firm


Top Style: Euro Top


Cover Material: Skin-friendly Fabric


Number of Layers: 7


Fill Material: Gel Memory Foam, High Density Foam


Weight Limit: 800 Pounds


Special Feature: Breathable, Durable, Low Motion Transfer, Pressure Relief


Item Firmness Description: Medium Firm


Number of Layers: 7


Weight Capacity Maximum: 800 Pounds


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


Mattress Coil Type: Pocketed Coil


Construction Type: Hybrid


Number of Mattress Coils: 600


Is Customizable?: No


Mattress Base Compatibility: Adjustable Base, Platform Bed, Slatted Base


Size: King (U.S. Standard)


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


Item Thickness: 14 Inches


Item Dimensions: 80 x 76 x 14 inches


Item Depth: 14 inches


Cover Material: Skin-friendly Fabric


Fill Material: Gel Memory Foam, High Density Foam


Product Care Instructions: Spot clean


Mattress Comfort Layer Material: Comfort Foam, Gel Memory Foam


Material Type: Foam, Gel Foam, Memory Foam, Pocket Springs, Skin-friendly Fabric


Brand Name: Ruoysun


Model Name: King Size Mattress


Product Benefits: Back Pain Relief, Improves Sleep, Posture Support, Pressure Relief, Stress Relief


Model Number: King Mattress 14 inch


Mattress Type: Standard Mattress


Manufacturer: Ruoysun


Manufacturer Part Number: RUO14K


Unit Count: 1.0 Count


Included Components: King Mattress


Age Range Description: Adult


top-style: Euro Top


Color: Grey


Style Name: 14 Inch


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Aug 9

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.

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Top Amazon Reviews

    • Just right
Item Firmness Description: Medium Firm Item Thickness: 12.0 Inches Size: King (U.S. Standard)
At first I wasn’t too sure if a mattress in a box would be any good but we where In a rush to get a new king bed my husband ordered this while we were driving from FL to S.C. to our new home and it arrived at the same time we were unloading it expanded rather quickly but it give it 72 hours to fully expand it was a bit soft when I sat on it but it’s just right especially for my back I have 3 herniated disc and this bed was so comfy and the perfect firmness ... show more
Reviewed in the United States on May 27, 2026 by Candi🖤Urbaez
    • Comfortable
Item Firmness Description: Medium Firm Item Thickness: 12.0 Inches Size: King (U.S. Standard)
This mattress has been amazing I just wish the sides wouldn’t give when you sit on it. Set up was very easy and I have the support I was looking for! Very comfortable. . Thank you Darlene
Reviewed in the United States on May 30, 2026 by Darlene Ikerd
    • Good buy!!
Item Firmness Description: Medium Firm Item Thickness: 12.0 Inches Size: King (U.S. Standard)
Just as advertised, make sure to plan ahead for the 72 hour full expansion of the mattress before use.
Reviewed in the United States on March 30, 2026 by Snake
    • Good
This is a good mattress for the price point. It arrived in a surprisingly small box, but does expand to full size in about a day. It is a great guest room mattress!
Reviewed in the United States on July 22, 2025 by Kevin Grierson
    • Good quality and good price.
This is Ruoysun Full Size Mattress, Medium Firm Full Bed Mattress in a Box, Hybrid Construction Individual Pocket Springs with Gel Memory Foam, Pressure & Back Pain Relief, CertiPUR-US. This is a full size mattress that come in a box. The mattress is of good quality. I unboxed and took off the plastic. The instructions say it can take 72 to expand. It was 80% inflated in an hour and 100% the next day. The memory foam on top is good. It is a little on the softer side. This says "Medium-Firm" and that is about right. I think I like a firmer mattress, but that is just my preference. The mattress is just a described. The quality of the build is good. I like the hybrid construction with the coils on the bottom. The mattress comes with a mattress cover as well which is nice. It even comes pre-installed on the mattress. I have slept on this for several nights now and I do like it. I switched from a coil mattress. The memory foam mattress sleeps "hot". The mattress traps more heat next to your body than a traditional mattress. This can be good or bad depending on your preference. Overall, this is a really good quality mattress at a good price! ... show more
Reviewed in the United States on April 9, 2025 by DrHelper
    • Nice mattress for average weight people.
For starters, I'm 330lbs and 6ft 4, and this is a bit *too* soft for me. But that's expected as people over 250lbs tend to perceive mattresses as softer since they depress more under our added weight. That said, I'd put it on the softer end of medium, where someone who is of average weight would probably put it at the higher end, and someone super skinny would think it's firm. Hope that helps! For me, I need firm, but for an average person, this will be exactly what it says it is and I think the feel of it is wonderful. Just not for long term use if you're REALLY big like me. Oh, and it only took a few hours to expand, and there were no weird smells once it did. I have an air quality monitor too that measures VOCs and they only went up 2 parts per million, which for a ton of brand new foam, is quite excellent, and still well within safe healthy ranges. ... show more
Reviewed in the United States on April 20, 2025 by Glass
    • Mattress
This mattress is pretty comfortable and gives good support, especially for my back. I like that it stays cool and doesn’t get sweaty during the night. The pocket springs help reduce noise and I don’t get disturbed when my partner moves. The edge support is strong, so I don’t feel like I’ll roll off. The only downside is it took a couple of days to fully expand after unboxing, which was a bit annoying. Overall, a good mattress for the price. ... show more
Reviewed in the United States on June 30, 2025 by Reviewer
    • Comfort Meets Support – Best Sleep Upgrade.
I recently upgraded to the Ruoysun Full Size 10-Inch Hybrid Mattress and couldn't be happier. Right out of the box, it expanded quickly and had minimal odor. The combination of gel memory foam and individual pocket springs strikes the perfect balance—it's supportive without being too firm. I’ve noticed significantly less tossing and turning, and the zoned support really helps with back and hip pressure. Motion isolation is a huge plus; my partner’s movements no longer wake me up. The medium-firm feel is just right—not too soft, not too hard. It’s also surprisingly cool at night, thanks to the gel layer. For the price, the quality is outstanding. Highly recommend this mattress if you want hotel-like comfort with great spine alignment and restful sleep. ... show more
Reviewed in the United States on April 25, 2025 by Nhat Nguyen

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