Best Fenix King-Size Mattresses


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No more spending hours trying to decide which Fenix king-size mattress you need! By reading this guide, you'll have an excellent understanding of what kinds of mattresses are available on the market, so you can confidently buy a mattress that will ensure comfortable sleep for years to come.

When it comes to purchasing a mattress, it's not just about which Fenix king-size mattress is right for you, but what the brand has to offer you. The company sells mattresses for a reasonable price and manufactures mattresses with various firmness levels, so you can pick the option you think is most comfortable based on your favorite sleeping position. Fenix has many mattress types, giving you the chance to find amazing quality products without feeling limited by your choices. Now that you know all about Fenix, you'll want to hear all about Fenix king-size mattresses.

King-size mattresses are perfect for couples, providing extra space for two people to sleep comfortably. These king-size mattresses measure 76" X 80" and are ideal for master bedrooms. However, king-size mattresses are not suitable for small areas, taking up a majority of the free space in your room. Additionally, king-size mattresses are large and heavy, making them hard to transport and flip.

Our Top Ranking Mattresses:
Our Top Ranking Mattresses
Best Overall Score
An image of Fenix Firm Memory Foam King-Size Responsive Temperature-Smart 11.5-Inch Mattress

Looking to go the eco-friendly route? Consider the Fenix Firm Memory Foam King-Size Mattress. This Fenix mattress features a memory foam construction, letting you toss and turn and then re-contours to your body after you've settled. Equipped with pressure point relief technology, it is perfect for stomach sleepers. Built with antimicrobial materials, it fights against any dangerous bacteria.

With a firm comfort level, this thick mattress is good for people who sleep on their back because it offers excellent spinal support. It has an 11.5-inch thickness, which can appear disproportional in some bed frames. Available in a king-size, it ensures that you'll have a lot of room to spread out and enjoy a good night's sleep. This Fenix mattress features a quilted cover, providing added comfort and cushioning. It has a responsive foam core, meaning it adjusts to small movements, allowing it to contour to your body for optimal support. This hypoallergenic mattress is eco-friendly, so it is composed natural materials rather than abrasive chemicals. With resistance to dust mites, this Fenix mattress makes it a good option for those who suffer from allergies.

    Pros
    • Firm mattress ensures a deeper and more restful sleep
    • Responsive foam core reacts to small movements, allowing it to contour to your body for optimal support
    • Antimicrobial benefits protect you from dangerous bacteria
    Cons
    • King-size can be difficult to move
    • Firm mattress can put uncomfortable pressure on pressure points
    • 11.5-inch thickness may tend to appear bulky in some bed frames
Runner Up
An image of Fenix Firm Latex Hybrid King-Size 11.5-Inch Mattress

The Fenix Firm Latex Hybrid King-Size Mattress is a great choice for anyone who gets very hot while they're sleeping. This thick mattress has antimicrobial benefits, which assist people sensitive to allergies. Featuring pressure point relief technology, it is good for stomach sleepers. It has a latex hybrid construction, which can be heavy and burdensome to move around or store.

This Fenix mattress has an 11.5-inch thickness, so it won't sink, sag, or leave body impressions after a long period of time. It has a firm comfort level, which is good for anyone searching for the perfect mix of softness and support. Available in a king-size, it ensures that you'll have a generous amount of room to spread out and enjoy a good night's sleep. It features a ventilated design so that it will remain dry in order to prevent mildew and mold from growing. It is resistant to dust mites, minimizing your exposure to allergens.

    Pros
    • Firm mattress provides a comfort level suitable for anyone searching for the ideal mix of softness and support
    • Equipped with antimicrobial benefits to supply a clean and healthy sleep space
    • Pressure point relief technology ensures that your spine and joints are equally supported in order to avoid any discomfort
    Cons
    • King-size can be difficult to move
    • Firm mattress can put uncomfortable pressure on pressure points
    • 11.5-inch thickness can tend to appear disproportional in some bed frames
For Side Sleepers
An image of Fenix Plush Memory Foam King-Size Responsive Temperature-Smart 11.5-Inch Mattress

The Fenix Plush Memory Foam King-Size Mattress is a great choice for an eco-friendly option, without toxic chemicals and low in VOCs. Available in a king-size, this thick mattress offers an ample amount of room to stretch out and relax. It features a hypoallergenic design to decrease the effects of allergies. With a plush comfort level, it is perfect for those who love extra softness. This Fenix mattress is dust mite resistant, so your sleeping space will be allergy and pest-free. It has an 11.5-inch thickness, which provides a lot of foundational support and helps keep it in great shape for longer.

Featuring a memory foam construction, this hypoallergenic mattress re-contours itself to your body as you move around at night. It features a responsive foam core, which reacts to small movements, allowing it to contour to your body for optimal support. It has pressure point relief technology, which reduces pain or stiffness while sleeping. It is built with antimicrobial materials to minimize the chances of bacteria and other microbes surviving. It is eco-friendly, which means they are built with biodegradable substances. It has temperature-smart foam.

    Pros
    • Plush mattress is good for side and back sleepers whose main preference is comfort and softness
    • Features a responsive foam core, meaning it adjusts to small movements, allowing it to contour to your body for optimal support
    • Designed with antimicrobial benefits to decrease the chances of bacteria surviving
    Cons
    • King-size does not fit in small spaces
    • Plush mattress can get lumpy or sag over time
    • 11.5-inch thickness can appear bulky in some bed frames
Still Need Some Help Narrowing Down Your Options? Here's Some Additional Information to Consider:
Which Comfort Level Is Right for You?
Firm Mattresses

Interested in getting a firm mattress? A Fenix king-size mattress could be a good choice for you. These mattresses are ideal for back sleepers and are built with a 34-36 pound indentation load deflection rating. They distribute your weight properly, which will allow for even weight distribution. These improved circulation mattresses promote deeper sleep. One downside is that they may be uncomfortable if you're not accustomed to sleeping on hard surfaces, so it might take a few days to get used to them. Also, these mattresses can put painful tension on specific pressure points, including the shoulders and hips.

Plush Mattresses

Are you searching for a plush mattress? Consider a Fenix king-size mattress. These mattresses are built with an indentation load deflection ranking of 19-21 pounds and are ideal for individuals who tend to sleep on their back, sides, or stomach. They provide additional support, helping to relieve you of any back problems or joint pain that you're experiencing. These contouring support mattresses adjust to your body shape for enhanced comfort. Something to keep in mind is that they can become lumpy or sag over time, so your body won't be properly supported while sleeping. Additionally, these mattresses may be problematic if different sleepers will be using the bed, causing the surface to sink if there is a significant weight difference.

Mattress Type: Which Is the Best Choice for You?
Memory Foam Mattresses

Looking for a good memory foam mattress? This Fenix king-size mattress could be a good choice for you. Featuring pressure-point relief, these mattresses provide additional support to sensitive areas such as the shoulders and hips. They are built with various foam types for the cushion you desire without being jerky like spring mattresses. Featuring superior motion isolation, they are perfect for couples with a restless sleeper. However, they can smell a bit like chemicals at first, so you should air them out for at least 24 hours before adding sheets. In addition, they aren't waterproof, so any encounter with moisture can decrease their usable life and cause degeneration.

Latex Hybrid Mattresses

Looking for a good gel memory foam mattress? This Fenix king-size mattress might be a good choice for you. These mattresses are good at dissipating heat instead of absorbing it, providing a cool sleep temperature. They feature a breathable design, so there is proper ventilation and airflow. They have a balance of firmness and softness for endless comfort throughout the night. They are designed with different types of coils, so you can choose between plush to firm comfort. They are designed with low VOC foam, so they won't release harmful chemicals. They feature superior motion isolation, so restless sleepers would highly benefit from these mattresses. However, they are hard, so if you prefer softer mattress, this might not be the best choice for you. Additionally, they are not easily available, so you usually can't try it before buying it.