The Bedr Sleep Blog is reader-supported. When you buy through links on our site, we may earn an affiliate commission.

(Top 5) Best "8-Inch Thick" Memory Foam Mattresses To Buy Online 2023

Where to buy an 8 inch thick memory foam mattress


Quality 8 inch thick memory foam mattresses are hard to find in the mattress industry. The options you find on Amazon are mainly made in China with lower quality foams and materials, while many of the companies locally make their mattresses with a thicker 10″ or 12″ profile. Luckily, we have put together a list of the best 8 inch memory foam mattresses on the market. All of these options are quality mattresses that you can trust and that will last for years to come. Whether you need an 8 inch mattress for your RV bunk, Trundle bed or daybed, you have come to the right place. 

AFFILIATE DISCLOSURE: Some of the links in this article are affiliate links. This means we may be compensated if you decide to purchase an item through one of our links.

Is an 8 inch thick memory foam mattress enough support?

A quality 8 inch mattress, with high density foam will be thick enough to support the vast majority of sleepers. 8 inches leaves enough room for a support foam and comfort layers. 8 inches is generally the thinnest mattress we recommend for all-around sleepers. 

What is an 8 inch memory foam mattress used for?

There are a variety of reasons and uses for a person to choose an 8 inch thick memory foam mattress. Below of some of the most common applications of an 8 inch thick mattress.

Trundle Beds: Trundle beds are a specific type of bed set where a mattress can be popped up from underneath the bed to accommodate an additional sleeper. Many trundle beds and murphy beds require a thinner mattress to be able to fit underneath the bed when not in use. Most trundle beds will require a mattress that is 8″ thick or thinner. 

Bunk Bed: Bunk beds often require a thinner mattress that will fit below the safety rail. A thick mattress will lift the sleeper too high above the safety rail and can be hazard for sleepers to potentially fall out of bed. We recommend checking with your specific bunk bed manufacturer to see what thickness of mattress they recommend for your model.  

Lower Overall Bed Height: Many individuals have trouble getting in and out of a bed set that is too high off the ground. They then opt for a thinner mattress in order to make the overall height of their bed lower. If that is the case but you would prefer to stay with a thicker mattress you can always use a low profile box spring, bed slats or a bunkie board to lower the overall height. 

The benefits of an 8 inch memory foam mattress

Price: In general the thinner the mattress, the less material used and lower the price point. An 8 inch thick mattress is generally more affordable than thicker thicker competitors and has options as low as a few hundred dollars. 

Pressure relief: Memory foam is one of the best materials at providing pressure relief to joints and muscles. Its ability to adapt to the bodies curves allows for it to provide comfort to a wide range of sleepers and sleeping styles. 

Thinner profile: The thin profile of an 8 inch mattress means it can fit in a variety of beds that require thinner mattresses. Bunk beds, trundle beds and RVs all generally require a thinner mattress to fit properly

Top 5: 8-Inch Memory Foam Mattresses



The best all around memory foam mattress for the price.
Over 2,000 5-star reviews. Made in USA.

From $243


The Brooklyn Chill memory foam mattress by Brooklyn Bedding is one of the most popular memory foam mattresses on the market due to its quality and entry level price point. Brooklyn Bedding makes all of their mattresses at their own factory in Arizona, so they can cut out the middleman and pass the savings along to you. The Brooklyn Chill is available in four different thicknesses ( 6 inch, 8 inch, 10 inch and 12 inch ). Their 8 inch thick option starts at $243 for a twin as is a great price point for the quality. 



High quality gel memory foam with an organic cotton cover.

From $659


The Cool Bliss gel memory foam mattress by Plushbeds is made for RVs but can comes standard in all mattress sizes and can be a great option for your home as well. Plushbeds has made this mattress with cooling gel infused memory foam to help keep heat out during those warmer months and keep you sleeping cool. Memory foam is known for sleeping slightly warmer in general so this is a great option for those who want to sleep cooler but still want the benefits of memory foam. 



Comfortable 2-sided mattress for all sleep preferences. Organic cotton cover.
Great reviews (over 200 5-star reviews).

From $299


The luxury gel foam mattress by Mattress Insider gives a  luxury memory foam feel at a great price. The mattress also allows for you to unzip and rearrange the foam layers in order to make the mattress firmer or softer. Mattress Insider has coupled this mattress with a high end organic cotton cover that you can feel comfortable resting your head on. Mattress Insider has been in the mattress industry since 2008 and is a brand you can trust. If you enjoy the feel of memory foam and want a product that will last then this is a great option for you. 


A quality memory foam mattress at an affordable price


This mattress is crafted with skillfully engineered memory and comfort foams that mold to the shape of your body for a customized fit that pressure relief. The top layer is made of ultra cooling-gel infused memory foam which means that your body temperature will perfectly regulated and cool.The mattress is wrapped in a soft feathers poly jacquard cover and delivered to your door with a 10-year free warranty.



A mattress built for kids that includes a waterproof cover and a pillow

From $399


5 Little Monkeys is one of the only companies on the market that manufactures a mattress specifically for kids. Their mattress is 8″ thick and made of temperature regulating memory foam. It also comes with an organic cotton removable/washable cover and a pillow. The 8 inch thickness of this mattress will easily slide under a trundle bed and the memory foam and organic cotton will be plenty of support and comfort for your kids. 

Need accessories for your mattress?

If you need sheets, comforters, mattress protectors, etc… all of the companies listed above also provide accessories that you can purchase with your mattress. 

Alternative options for purchasing a custom 8 inch mattress?

If you prefer not to purchase your mattress online you can look for custom mattress factories in your area to build you a mattress you can test out before buying. A couple custom mattress manufacturers you can check out in person are:

What to do with your old mattress?

When you purchase a mattress online you are left to find a way to get rid of your old one. Luckily “A Bedder World” has mattress disposal services throughout the country. We work with mattress recycling centers to make sure your old mattress gets disposed of in the most eco-friendly manner possible. To date we have recycled over 500K mattresses. Book a pick up here. Or try recycling it yourself!


8 inch profile memory foam mattresses are less common in the market place and there are only a few high quality companies providing options for replacement mattresses. All of the companies listed in this post are companies that we trust and that have great reputations within the sleep community. You can feel confident placing an order with an of them. 

Leave a Comment

Your email address will not be published. Required fields are marked *