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Serta Ultimate 4-inch Memory Foam Mattress Topper Review

By: Kelly Burgess on August 18, 2016

Bottom Line

The Serta Ultimate 4-inch Memory Foam Mattress Topper is a good choice for those who prefer a very soft bed. Many users like the way they sink into the thick, dense foam, and say it's great for relieving pain in their back and joints. However, others complain that the topper is too soft to provide good support and makes it hard to move around. It comes in twin, full, queen, king and California king sizes. Serta also makes a well-reviewed 2-inch topper, the Serta Deluxe 2-inch Memory Foam Mattress Topper ($60 and up).


  • Comfortable
  • Good for pain relief
  • Durable
  • Three-year warranty


  • Too soft for some
  • May retain heat
Our Analysis
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Breaking it down


Very soft, but not very supportive. Owners agree that Serta Ultimate 4-inch Memory Foam Mattress Topper is very soft; many reviews compare it to sleeping on a cloud. That's great for some, but not everyone. Some say they sank too far into this 4-inch memory topper, and felt as if they were sleeping on a giant sponge. However; the vast majority of users say it has transformed their old mattress and greatly improved their sleep, adding that it is soft yet supportive. The topper seems to be most popular with side sleepers, less so with stomach sleepers. Very few co-sleepers report "rolling" into each other due to dips in the middle. Like most memory foam mattress toppers, the Serta retains body heat to some degree, but most users don't find it bothersome and some say they appreciate the added warmth.

Ease of use

Odor disappears quickly. Like all memory foam mattress toppers, the Serta Ultimate 4-inch Memory Foam Mattress Topper has a chemical odor when new, but most reviewers find that the smell is minimal and disappears if the topper is aired out for a couple of days before use. The manufacturer suggests taking it out of the box and allowing it to unroll itself for 48 hours; this also gives any odors time to dissipate. However, many owners say the mattress pad was completely expanded and the odor gone in just a few hours. Some reviewers say that the Serta topper tends to run a bit smaller than the mattress they buy it for; although few report that as a problem, merely an observation.


Longer-than-customary warranty. Many owners who purchased the Serta Ultimate 4-inch Memory Foam Mattress Topper as a temporary solution for a sagging mattress report being very pleased at how long it kept its shape and support. We found very few complaints of compression, tearing, or other durability issues, although there were a few owners who said they accidentally tore chunks out of the mattress, or that it came with a chunk torn out; however, these are generally corner pieces that don't affect the performance of the memory foam topper. The Serta Ultimate is made from viscoelastic memory foam which is hypoallergenic and antibacterial. It comes with a long, three-year warranty.

Our Sources

Editors of SleepLikeTheDead.com, March 30, 2016

The Serta Memory Foam Mattress Topper is second on this list of six top memory foam mattress toppers, with an owner satisfaction rating of 89 percent based on the input of more than 25,540 owners. Although SleepLikeTheDead.com editors do acknowledge that Serta is the most popular mattress topper overall (the topper with the highest percentage is based upon far fewer sales/reviews). They also note that the 2-inch Serta topper is one of the highest rated.

Contributors to Overstock.com, As of August 2016

The various sizes of the Serta Ultimate 4-inch Memory Foam Mattress Topper earn an overall rating of 4.5 stars out of 5 in more than 6,200 reviews. User say it's extremely comfortable, yet surprisingly supportive. There are many raves from those who suffer from back pain, fibromyalgia, and arthritis who say they wake up pain free every morning now.

Contributors to Amazon.com, As of August 2016

In nearly 230 reviews, the Serta Ultimate 4-inch Memory Foam Mattress Topper earns a score of 4.1 stars out of 5. Reviews are for all sizes. Owners are mainly pleased, saying it's comfortable and soft; others say it's too soft. We also spotted some shipping-related complaints that bring down the overall score.

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