Walmart US Ecommerce Website

GENERAL MERCHANDISE

PHARMACY

GROCERIES

VUDU

SPARK

PHOTO

ADVERTISING

SAVINGS CATCHER

GIFTCARDS

INHOME

AFFILIATE

ONEAPP

LOTUS

HELP

SMART_REORDER

GROCERY

CONV_COMMERCE

SURGEON GENERAL'S WARNING: Smoking Causes Lung Cancer, Heart Disease, Emphysema, And May Complicate Pregnancy.

SURGEON GENERAL'S WARNING: Quitting Smoking Now Greatly Reduces Serious Risks to Your Health.

SURGEON GENERAL'S WARNING: Smoking by Pregnant Women May Result in Fetal Injury, Premature Birth, And Low Birth Weight.

SURGEON GENERAL'S WARNING: Cigarette Smoke Contains Carbon Monoxide.

DynamicCardCarousel For Tobacco Warnings

NEW AddToCart Wed Apr 09 2025 3:20 PM PDT

Related items to consider

NEW BuyBoxAd Wed Apr 09 2025 3:34 PM PDT

NEW BuyBoxRatingsAndReviews Wed Apr 09 2025 3:11 PM PDT

NEW FlowerDeliveryDate Wed Apr 09 2025 3:16 PM PDT

I want shipping & delivery savings with

#0071dc

NEW Fulfillment Wed Apr 09 2025 3:18 PM PDT

NEW GeneralWarningsPlaceholder Wed Apr 09 2025 3:48 PM PDT

NEW GiftingEligibilityBadge Wed Apr 09 2025 3:17 PM PDT

NEW ItemRelatedShelves Wed Apr 09 2025 3:35 PM PDT

more

Item prices may vary between online (for pickup, shipping or delivery) and in club. Item prices do not include fees for pickup, shipping or delivery (if applicable) unless noted in the item description.

NEW LegalPriceDisclaimer Wed Apr 09 2025 3:15 PM PDT

NEW ListsAndRegistries Wed Apr 09 2025 3:22 PM PDT

NEW MarqueeDisplayAd Wed Apr 09 2025 3:35 PM PDT

NEW MarqueeDisplayAd Wed Apr 09 2025 3:39 PM PDT

NEW PriceInformation Wed Apr 09 2025 3:13 PM PDT

NEW ProductDescriptionPlaceholderATF Wed Apr 09 2025 3:32 PM PDT

NEW ProductDescriptionPlaceholder Wed Apr 09 2025 3:40 PM PDT

NEW ProductDirectionsPlaceholder Wed Apr 09 2025 3:44 PM PDT

NEW ProductIndicationsPlaceholder Wed Apr 09 2025 3:43 PM PDT

NEW ProductName Wed Apr 09 2025 3:10 PM PDT

NEW ProductReturnPolicy Wed Apr 09 2025 3:21 PM PDT

NEW ProductSpecificationsPlaceholder Wed Apr 09 2025 3:41 PM PDT

NEW ProductStickyBuyBox Wed Apr 09 2025 3:23 PM PDT

NEW ReviewsPlaceholder Wed Apr 09 2025 3:51 PM PDT

NEW Variants Wed Apr 09 2025 3:14 PM PDT

Sams PDP BrandLink Wed Apr 09 2025 2:02 PM PDT

Sams PDP Breadcrumb Wed Apr 02 2025 8:40 PM PDT

Sams PDP ItemFitment Wed Apr 09 2025 2:00 PM PDT

Sams PDP ProductFlags Wed Apr 09 2025 3:09 PM PDT

Sams PDP ProductImages Wed Apr 02 2025 8:49 PM PDT

Sams SkylineDisplayAd Thu Jul 10 2025 11:02 AM PDT

Sams SNAP Badging Wed Jan 21 2026 8:38 PM PST

Apply Now

Get a $30 statement credit when you open an account and use it to make $30 in eligible Sam's Club purchases within 30 days¹.

¹Offer subject to credit approval. To qualify, you must (i) apply and be approved for a Sam’s Club® credit card account and (ii) use your new account to make Sam’s Club purchases totaling $30 or more (excluding cash advances, gift card sales, alcohol, tobacco and pharmacy purchases) within 30 days of date of account opening. When you open an account online or with your mobile device, purchases cannot be made at in-club registers until the physical card is received. Your physical card should arrive in 7-10 business days from date of account opening. A $30 credit will post to the account within 90 days after the qualifying purchases are made. Offer is valid for newly opened accounts only and each account is eligible for only one $30 offer. We reserve the right to discontinue or alter the terms of this offer any time.

Synchrony Credit Card Banner Anonymous

Complete your purchase with these

PDP boughtTogether SoftBundles Wed Apr 09 2025 3:49 PM PDT

PDP RR0 ItemCarousel Wed Apr 09 2025 3:38 PM PDT

PDP RR1 ItemCarousel Wed Apr 09 2025 3:52 PM PDT

Serta 3" Cool Nights Gel Memory Foam Mattress Topper, Assorted Sizes

Instructions

<summary>
<ul>
<li><strong>Advanced Cooling</strong>: Features a 3-inch gel memory foam with integrated cool-touch cover and cooling fibers, designed for enhanced breathability and faster heat removal for optimal sleep.</li>
<li><strong>Adaptive Support</strong>: Gel memory foam contours to body curves, providing pressure relief, even weight distribution, and promoting proper spinal alignment to reduce tossing and turning.</li>
<li><strong>Undisturbed Sleep</strong>: Engineered for motion isolation, the topper cushions impact and absorbs movement, ensuring peaceful rest free from a restless partner's movements.</li>
<li><strong>Effortless Care</strong>: Comes with a removable, machine washable cover that stretches like a fitted sheet, securely covering mattresses up to 17 inches deep while preventing sliding.</li>
<li><strong>Certified Quality</strong>: CertiPUR-US certified for environmental consciousness and durability, available in various standard sizes (Twin to Cal King) all with a 3-inch thickness.</li>
</ul>
</summary>

<p>The Serta 3" Cool Nights Gel Memory Foam Mattress Topper offers an exceptional upgrade in comfort with even more cooling power than traditional gel memory foam. Breathability on the surface removes excess heat from your body, helping you fall asleep faster. A cool-touch cover instantly soothes with cooling fibers that never wash out.</p> <p>Underneath, gel memory foam cools as you sleep, adapting to the distinct curves of your body for pressure-relieving support. This helps prevent tossing and turning. Memory foam evenly distributes your weight, which gently promotes proper spinal alignment. It also isolates motion, so your sleep remains undisturbed next to a restless partner. Plus, the removable cover is machine washable, so you can refresh your sleep space in a pinch for reliably restful nights.</p> <h3>Motion Isolation</h3> <p>Memory foam is designed to cushion impact and absorb movement. This means that when your partner moves, or gets into and out of bed, you will experience less movement and more undisturbed sleep.</p> <h3>Machine Washable Cover</h3> <p>The Serta 3-Inch Cool Nights Gel Memory Foam Topper includes a removable cover that is machine washable and dryable. It stretches like a fitted sheet to cover up to a 17-inch deep mattress and prevents topper from sliding.</p> <h3>Can you cut this memory foam topper?</h3> <p>Although the foam can be cut to reduce size, the removable cover is designed to fit this topper. Therefore, we recommend buying a topper to fit your bed. The Serta 3" Cool Nights Memory Foam Mattress Topper is available in a size to fit your mattress.</p> <h3>Does this mattress topper have an odor?</h3> <p>Our products are vacuum-packed and sealed immediately for your protection, which sometimes results in a "new" smell when unpacked. The smell is harmless and will disappear quickly. Rest assured all our foams are CertiPUR-US® certified to be environmentally conscious and tested for durability.</p>

Brand

<ul>  <li>3-inch gel memory foam mattress topper for enhanced comfort</li>  <li>Advanced phase change cooling technology for ideal sleep temperature</li>  <li>Pressure-relieving support from responsive gel memory foam</li>  <li>Machine washable and dryable cool cover for easy cleaning</li>  <li>Extends mattress life with improved comfort</li> </ul>

Specifications

<ul><li>3-inch gel memory foam mattress topper for enhanced comfort</li><li>Advanced phase change cooling technology for ideal sleep temperature</li><li>Pressure-relieving support from responsive gel memory foam</li><li>Machine washable and dryable cool cover for easy cleaning</li><li>Extends mattress life with improved comfort</li></ul>

Size

Twin

Twin-XL

Full

Queen

King

Cal-King

I brought this for family member! It is so comfortable!, it helped to relieve stress and sore muscles /back! So much so, that my my sister went out and bought one! Her and her husband love it!

You can’t just have one!

I recently fell & have a compression fracture in spine. Sleep was misery. A friend suggested a 3” foam topper. This Serta product from Sam’s has helped so much allowing a few hours of disturbed sleep. Perhaps too soft for a healthy back, but at this point, I am so pleased & grateful.

Sleep…finally

We recently bought a new mattress but it was still too firm for our liking so I ordered this topper hoping it would help. And it did! My husband and I both have shoulder issues and this has definitely made sleeping so much better. To be honest, the "cooling" claim isn't spot on. Neither me or my husband find it cooler but the comfort is better so we aren't disappointed with our purchase at all.

Very comfortable

Great. Perfect height and cushion. Stays fairly cool. I never buy plush soft beds that eventually sag and make you back hurt. I always buy beds that are firm and support you for years. This topper was a perfect addition! now I have a firm bed with a subtle cushion that supports me perfectly. I’ve always learned that you can make a firm bed softer, but you can’t make a soft bed firmer.

Perfect addition!

Really really really thought that I was taking a risk buying this mattress. I had tried others with disastrous results because of the noxious smells so my wife and the little voice in the back of my head was telling me what a mistake it would be to buy it. But I am very very very happy I decided to buy it and it has really made a great difference in my sleep. First of all the smell of plastic foam is minimal and went away quickly in a day. I placed it on a mattress which was quite old but still had no defects and made it feel like a new mattress. The gel is soft but still not mushy and holds its shape well. I have a bad back and, even though my mattress is good enough to help  with a comfortable and therapeutic sleep this foam mattress makes it even better. So I highly recommend it if you need to upgrade a current mattress or are looking for a less expensive alternative to a therapeutical one.

It Is Great!

Received damaged.  I ordered the king size, so, as you can imagine, it’s quite heavy.  I had it delivered to my home.  It’s not in merchant packaging.  It delivered in a brown box, vacuum sealed.  As I get this out, remove the vacuum packaging, as I get to the last portion unroll, it starts expanding and there, on the inside portion/side is a a huge chunk missing from the topper, which looks like a manufacturer defect.  Now, after calling and going through the horrific automated customer service to figure out how to return this because it will not fit back in the box, I now have to wait for a return service to pick this up and figure out where to stash a heavy, king sized memory foam topper u til they pick it up!  What a nightmare!

Poor quality…damaged during manufacturing

The smell was unbearable. Even after several hours, it made my eyes water when I walked into the bedroom. I took the topper off and put it in my garage until I could return it the next day. The smell stayed on my mattress for about 24 hours after I removed it. I'm not sure how long it would take for the actual topper smell to go away or if it would go away. I was disappointed because it felt like it would be very comfortable.

Smell unbearable

Purchased for the titled cooling effect and it was a miserable several nights of no sleep. The feel of cooling materials was in the surface of the topper but after laying on it for a few hours it builds heat and holds it and then your overheating for the duration of your sleep. Not a good purchase for a hot sleeper.

Not cooling

Maybe I just got a bad topper because there are so many good reviews. The good reviews persuaded me to buy this. Sleeping on it the first week was great and did earn at least 4 stars, minus one for the odor from the topper. The second week earned only one star. I have arthritis and during the first week  the topper took pressure off my joints and I woke up with no pain. I slept better than I have in a while. By the second week the topper would just totally sink and become almost flattened to the point where I could feel my mattress underneath. It no longer provided any support or soft comfort for my joints and I have been tossing all night trying to get sleep. I don’t understand how it could be great for only one week. I’m only 5’2” and weigh 124 lbs so it should not have flattened in just two weeks. I really need to return this but don’t know how as it was shipped in a small box and no way it’s going back in after expanding. Guess I’m out of lots of money and back to looking for something that helps relieve joint pain. I would not recommend this topper to a friend, or anyone really.

Great for only one week!

I ordered this online and it came in a plain brown box rather than the nicer looking box that is in the club which made me think it was a previous return or was not from Serta, but it did have Serta documents in the box.  I tried to use the topper for two weeks and found that not only was it very hot it was very uncomfortable for me and did "cushion" the mattress at all.  Returned the topper without issue at my local club.

Serta 3" Cool Nights Gel Memory Foam Mattress Topper, Assorted Sizes

Shipping

Highlights

Zinus Night Therapy 4" Cooling Gel Mattress Topper With Washable Cover, Assorted Sizes