NightyNight 14" King Size Firm Mattress, Cooling Gel Memory Foam Mattress in a Box, Removable, Washable Cover & Non-Slip Bottom
NightyNight 14" King Size Firm Mattress, Cooling Gel Memory Foam Mattress in a Box, Removable, Washable Cover & Non-Slip Bottom
Hero image 0 of NightyNight 14" King Size Firm Mattress, Cooling Gel Memory Foam Mattress in a Box, Removable, Washable Cover & Non-Slip Bottom, 0 of 10
Flash Deal
Visit the NightyNight Store

NightyNight 14" King Size Firm Mattress, Cooling Gel Memory Foam Mattress in a Box, Removable, Washable Cover & Non-Slip Bottom

|24 ratings
NightyNight 14" King Size Firm Mattress, Cooling Gel Memory Foam Mattress in a Box, Removable, Washable Cover & Non-Slip BottomNightyNight 14 King Size Firm Mattress Cooling Gel Memory Foam Mattress in a Box Removable Washable Cover Non Slip BottomNightyNight 8 Full Size Firm Mattress Cooling Gel Memory Foam Mattress in a Box Removable Washable Cover Non Slip BottomNightyNight 12 Queen Size Firm Mattress Cooling Gel Memory Foam Mattress in a Box Removable Washable Cover Non Slip BottomNightyNight 10 Full Size Firm Mattress Cooling Gel Memory Foam Mattress in a Box Removable Washable Cover Non Slip BottomNightyNight 12 Twin Size Firm Mattress Cooling Gel Memory Foam Mattress in a Box Removable Washable Cover Non Slip BottomNightyNight 12 Full Size Firm Mattress Cooling Gel Memory Foam Mattress in a Box Removable Washable Cover Non Slip BottomNightyNight 8 Twin Size Firm Mattress Cooling Gel Memory Foam Mattress in a Box Removable Washable Cover Non Slip BottomNightyNight 10 Twin Size Firm Mattress Cooling Gel Memory Foam Mattress in a Box Removable Washable Cover Non Slip BottomNightyNight 6 Full Size Firm Mattress Cooling Gel Memory Foam Mattress in a Box Removable Washable Cover Non Slip BottomNightyNight 12 King Size Firm Mattress Cooling Gel Memory Foam Mattress in a Box Removable Washable Cover Non Slip BottomNightyNight 14 Queen Size Firm Mattress Cooling Gel Memory Foam Mattress in a Box Removable Washable Cover Non Slip BottomNightyNight 10 Queen Size Firm Mattress Cooling Gel Memory Foam Mattress in a Box Removable Washable Cover Non Slip BottomNightyNight 6 Twin Size Firm Mattress Cooling Gel Memory Foam Mattress in a Box Removable Washable Cover Non Slip Bottom
Bed SizeKing
Mattress Thickness14 in

Key item features

  • Removable Cover & Non-Slip Bottom

    Equipped with a fully removable, machine-washable cover and a No-slip bottom, this mattress allows for easy cleaning and stays firmly in place on any bed frame.

  • Stable Support & Long-term Comfort

    Constructed with a thick high-density base layer, the mattress delivers durable, firm support and consistent comfort for extended use.

  • Cooling & Fresh Sleep Experience

    Cooling gel helps maintain a comfortably cool sleep surface, Composed of multiple foam layers for optimal coziness and robust support.

  • Universal Fit & Quick Setup

    This bed-in-a-box mattress works with all standard bed frames and fully expands to its original shape within 72 hours after unboxing.

  • Safe & Fiberglass-Free Design

    Features OEKO-TEX® certified fabric cover and CertiPUR-US® certified inner foam, all materials tested for 1000+ harmful substances and free of toxic chemicals. Compressed and rolled in a box, it fully expands within 48–72 hours, supports up to 750 lbs, and comes with a 365-days warranty.

About this item

Product details

Specifications

Warranty

Customer ratings & reviews

4.3 out of 5 stars
stars
24 ratings13 reviews
How item rating is calculated
  1. 5 stars67% (16)
  2. 4 stars17% (4)
  3. 3 stars0% (0)
  4. 2 stars13% (3)
  5. 1 star4% (1)
Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
Sort by |

Showing 1-3 of 13 reviews

Sep 27, 2026
Reviewer name: carrie
Top Reviewer
Item details
Bed size: Twin
Mattress thickness: 6 in
Sold and shipped byNightyNight
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

⭐ Great Mattress for the Price ⭐️

I'm very happy with this mattress! It arrived securely packaged and started expanding after being removed from the box. The mattress feels comfortable and supportive, and the quality is impressive for the price. I'm giving it time to fully expand for the recommended 48 hours, but so far, I'm very pleased with it. ❤️

Incentivized Review
Helpful?52PV5U4UX2JA20156968542
reply from NightyNight

Hello carrie! Thank you so much for your wonderful review! We’re glad your mattress arrived securely packaged and began expanding right after unboxing. It’s fantastic that you love its comfort and supportive feel, and that you find the quality impressive for the price. We appreciate you following our recommendation to let it fully expand over 48 hours. Hope you continue to love your new mattress and enjoy many restful nights ahead! Sincerely, NightyNight Support Team

Sep 26, 2026
Reviewer name: Karen
Top Reviewer
Item details
Bed size: Twin
Mattress thickness: 8 in
Sold and shipped byNightyNight
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

nice med firm mattress

came well packaged, firm twin mattress. good for side sleeping which im a side or back sleeper. different layers of foam . comes with removable washable cover.

Incentivized Review
Helpful?52PV5U4UX2JA20156968542
reply from NightyNight

Hello Karen! Thank you so much for your detailed review! We’re pleased the twin mattress arrived well packaged and delivers the firm support you need. It’s awesome that it works great for both side and back sleeping. We’re happy you notice the multi-layer foam design and appreciate the removable, washable cover. Hope you enjoy consistent, comfortable sleep night after night! Sincerely, NightyNight Support Team

Sep 28, 2026
Reviewer name: Shana
Top Reviewer
Item details
Bed size: Full
Mattress thickness: 8 in
Sold and shipped byNightyNight
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Very comfortable

This is an exceptionally comfortable mattress! Feels so good laying on it and the simplicity of setting it up is just the cherry on top!

Incentivized Review
Helpful?52PV5U4UX2JA20156968542
reply from NightyNight

Hello Shana! Thank you so much for this fantastic review! We are thrilled to hear how exceptionally comfortable your new mattress is and that you love how easy it is to set up. It makes our day knowing you enjoy resting on it. Wish you countless peaceful nights ahead! Sincerely, NightyNight Support Team

Current price is Now $320.87
You save $299.12
was $619.99
Price when purchased online
  • Free shipping
  • Free Holiday returns until Jan 31
Walmart Accident Plan by Allstate
Pro Haul Away Service

How do you want your item?

Try 30 days for just $1! Choose a plan at checkout.
How do you want your item?
Ships to
Arrives by Thu, Oct 22
Sold by NightyNightPro Seller
Fulfilled by Walmart
4.560283687943262 out of 5 stars
4.6 stars out of 5, based on 141 seller reviews(4.6)
Extended holiday returns
Free Holiday returns until Jan 31
walmart plus

Try 30 days of Walmart+ for just $1!

T&C apply.