Read on to learn more about our favorite firm twin mattress.
Our Editor’s Best Firm Twin Mattress Reviews
Linenspa 6 Inch Innerspring Twin Mattress with Foam Layer – Firm Feel - CertiPUR-US Certified - Mattress in a Box

Key Features:
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This is a firm twin mattress that is made of memory foam. It may take up to 72 hours for the mattress to regain its full shape. The expansion time of the mattress will vary depending on the temperature of the room.
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The mattress is made with heavy gauge tempered steel coils for support and a quilted fabric cover with a deep foam layer for comfort.
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This mattress is ideal for a bunk bed, day bed, or trundle bed. It is firm, making it great for back or stomach sleepers. The surface is quilted for cozy comfort, while the steel coils offer more support below.
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This firm mattress is designed to work with any type of bed frame, including a box spring, slatted frame, platform bed, or metal grid.
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This is a firm twin mattress that is 6 inches thick. It is 39 inches wide and 75 inches long.
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This firm twin mattress is designed for easy installation, and can be removed from packaging within 72 hours. It may take up to 72 hours for the mattress to fully decompress before use.
IYEE NATURE Twin Size Mattress 8 inch Memory Foam Mattress/CertiPUR-US Certified Foam Bed Mattress in a Box Medium Firm Foam Mattresses Twin Mattress 6 Inch39*75″*8″

Key Features:
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The firm twin mattress is free of fiberglass and is designed to be health-conscious.
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The Iyee Nature Cooling-Gel Memory Foam Mattress has three layers of foam that work together to provide ultimate comfort. The top layer is memory foam, which contours to your body and provides support. The middle layer is a comfortable layer that provides additional cushioning. The bottom layer is a high density base support foam that gives the mattress its shape and provides support.
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This mattress is designed for comfort and breathability. It features memory foam that is conducive to continuous airflow and breathable. The skin-friendly fabrics adapt to the environment to keep the mattress surface at the ideal sleeping temperature. The buoyant, no-sink support foams adapt and conform to your body for optimal pressure relief. The specialized foams reduce motion transfer of a partner so your sleep is undisturbed.
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This firm twin mattress is made of memory foam and other materials that have been certified by CertiPUR-US and Oeko-Tex Standard 100 to be free of harmful substances like formaldehyde, mercury, and other heavy metals. It is designed to provide a stable sleep.
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The Iyee Nature twin mattress is a mattress designed and produced by a company specializing in mattresses. It has a 10-year warranty and is made to be comfortable for people of all ages.
Lucid 6 Inch Twin Mattress – Firm Gel Memory Foam Mattress Twin— Bamboo Charcoal Mattress in a Box—CertiPur Certified

Key Features:
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This firm twin mattress is made of memory foam and will expand to its full size within 24-72 hours after being delivered. It is important to note that the expansion time may vary depending on the temperature of the room.
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This mattress is a firm twin mattress that includes 1 inch of ventilated gel memory foam and 5 inches of bamboo charcoal infused support foam. This mattress is ideal for stomach and back sleepers.
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This firm twin mattress contains a layer of memory foam for a soft support, as well as ventilation holes for easy air transfer.
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The bamboo charcoal in this mattress is designed to help keep it fresh and hypoallergenic.
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This is a firm twin mattress that is great for stomach and back sleepers. It can be placed in any room and works well with any slatted bed frame, platform bed, or adjustable base.
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This Lucid twin mattress is designed to be compressed and shipped in one box for easy delivery and setup. Once you unbox and unroll it, you should wait 24-48 hours for the mattress to expand fully. In cooler temperatures, the expansion process may take longer.
Lucid 5 Inch Firm Gel Memory Foam Mattress Twin— Gel Infusion—Hypoallergenic Bamboo Charcoal—Breathable Cover

Key Features:
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This mattress is a firm twin mattress that is ideal for side, stomach, and back sleepers. The mattress includes 1 inch of ventilated gel memory foam and 4 inches of bamboo charcoal infused support foam. The expansion time of the mattress will vary as per the surrounding temperature.
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This mattress has a layer of memory foam for soft support, and it is ventilated for easy air transfer.
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This mattress has a top layer of memory foam that is infused with cooling gel. The gel helps to regulate body temperature and provides a more comfortable sleep climate.
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The mattress is a firm twin mattress that is perfect for any occasion. It is great for side, stomach, and back sleepers. It fits well in an RV, bunk bed, or child’s bed. It works well with any slatted bed frame, platform bed, or adjustable base.
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The mattress is designed to be compressed and rolled so that it can be shipped in one box. It is also designed to expand within 24-48 hours after being unrolled.
Linenspa 5 Inch Gel Memory Foam Mattress, Firm Mattress, Low Profile Bed Twin 5 Inch Mattress

Key Features:
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This firm twin mattress is made of memory foam and will expand to its full size in 24 to 72 hours. It may take longer to expand in cold temperatures.
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The mattress is four inches of high-density base foam topped with an inch of comfortable, gel-infused memory foam. The mattress is firm and supportive, making it great for stomach or back sleepers.
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This twin mattress is versatile and perfect for a bunk bed, day bed, trundle mattress, RV mattress, or other low profile bed option. It is great for kids, teens, or guest rooms.
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The Linenspa 5 inch mattress is a firm mattress designed for use with any type of bed frame. It is made of high-density foam for support and durability, and has a quilted top for comfort.
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This mattress is a firm, gel memory foam mattress that is rolled, compressed, and boxed for convenient delivery and setup. Simply remove the packaging and allow the mattress to decompress for 48-72 hours.
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The mattress is made of gel memory foam and is backed by a 10-year warranty.
Signature Design by Ashley Chime 10″ Firm Memory Foam Mattress, CertiPUR-US Certified, Twin

Key Features:
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This mattress is made of memory foam, which contours to your body and provides support. It is also designed to be comfortable and leave you feeling refreshed in the morning. Please allow 24-72 hours for the mattress to fully expand after delivery.
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The mattress is 10 inches thick with a memory foam layer that contours to your body and a support foam layer that relieves pressure points. The cover is made of stretch knit fabric.
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This mattress is firm and supportive, making it a good choice for back and stomach sleepers. The memory foam provides a soothing layer of comfort, while the firm foam offers support.
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This firm twin mattress is 38 inches wide, 74.5 inches long, and 10 inches high. It is compatible with most twin bed frames, and a bed foundation, box spring, and frame are available for purchase separately.
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This firm twin mattress is designed for instant enjoyment. It arrives in a box and can be simply unboxed, cut the protective wrap, unrolled, and watched as it expands.
Modway Jenna 10” Innerspring and Memory Foam Twin Mattress With Individually Encased Coils

Key Features:
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This is a firm twin mattress that will take 24-72 hours to expand to its full size. The expansion time will vary depending on the temperature of the room. Assembly is required.
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The Jenna firm twin mattress is a great option for couples who want to limit bounce and motion disturbance between partners. The mattress features individually encased springs for added comfort and support.
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This is a firm twin mattress that includes a fire resistant polyester barrier and a 10-year warranty against manufacturer defects.
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This firm mattress has a layer of memory foam for comfort, as well as 8.5” tall individually wrapped coils for support. It also has a padded quilted tight-top for a smooth, even feel.
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The firm twin mattress is easy to set up and only takes a few minutes. You can position the mattress box next to your bed and unroll it to place in your desired spot. The mattress will expand fully in about 24 hours.
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This firm twin mattress is made of memory foam and will take 24-72 hours to expand to its full size. The expansion time may vary depending on the temperature of the room.
Inofia Twin Mattress, 10 Inch Twin Size Mattress in a Box, Breathable Comfortable Cool Single Hybrid Mattress,Supportive & Pressure Relief, Motion Isolating Individually Wrapped Coils,Medium Firm

Key Features:
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This firm twin mattress is designed with responsive memory foam and durable pocket springs, which are able to offer sleepers a good night sleep by offering enough support and releasing pressure points. You could enjoy the best sleep experience during the whole night.
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The Inofia twin mattress is designed to fit your body perfectly and help you enjoy a relaxing sleep. It is made with advanced ergonomics technology and has a medium-firm feel.
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The Inofia hybrid innerspring twin mattress is a mattress that is designed to be cool to sleep on. The top cover is skin friendly and soft to touch, and the side net cloth around the comfort foam helps to dissipate heat. The pocket springs underneath the mattress also help to enhance airflow.
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This mattress is a firm twin mattress that is shipped in a box and delivered to your door. It is recommended that you allow 72 hours for the mattress to recover its original shape and dissipate any smell.
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This mattress is from Inofia and is a firm twin mattress. It comes with a 101 night risk-free trial so that customers can be sure they are satisfied with the purchase. The mattress should be rotated from end to end every 2-3 months.
Lucid 8 Inch Twin Mattress – Firm Gel Memory Foam Mattress – Bamboo Charcoal Foam –Gel Infused- Hypoallergenic Foam

Key Features:
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This mattress is a firm twin mattress that is designed to hold any reasonable amount of human weight. The expansion time of the mattress will vary as per the surrounding.
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This mattress is designed for stomach and back sleepers, and is perfect for teens and growing children. It provides a firm feel that is ideal for these types of sleepers.
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This mattress has a layer of memory foam for comfort and a layer of bamboo charcoal base foam for support.
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This firm twin mattress is made with bamboo charcoal foam, which is hypoallergenic and helps reduce odors.
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This is a firm twin mattress that does not require a box spring. It is designed to fit in any room and works well with slatted bed frames and platform beds.
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The firm twin mattress is a compressed, rolled mattress that is shipped in one box for easy delivery and setup. Simply unbox, unroll, and wait 24-48 hours for the mattress to expand.
LINENSPA 8 Inch Memory Foam and Innerspring Hybrid Mattress – Twin Mattress – Bed in a Box – Medium Firm Mattress

Key Features:
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This mattress is a hybrid of memory foam and steel springs, designed to be contouring and comfortable while also being durable. It may take up to 72 hours for the mattress to fully expand after being delivered.
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This mattress is a good value for the price, and it is made with durable materials that will last for many years.
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This mattress is perfect for those who need a little extra support. It has multiple supportive layers that make it perfect for bunk beds, kid’s rooms, RVs, guest rooms, and more.
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The Mattress is a firm mattress that is 8 inches thick. It is designed for sleepers of all ages. The 10 inch mattress and 12 inch mattress are even more comfortable.
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The firm twin mattress is an innerspring and memory foam mattress that is shipped directly to the customer’s door. It is a bed in a box that includes the complete package.
Firm Twin Mattress FAQs
1. What are the dimensions of a firm twin mattress?
The dimensions of a firm twin mattress are 39″ x 75″ x 10″.
2. How much does a firm twin mattress weigh?
The average firm twin mattress weighs between 40 and 50 pounds.
3. What is the firmness of a firm twin mattress?
A firm twin mattress is typically considered to be a 6 on a 1-10 scale, with 1 being the softest and 10 being the firmest.
4. What is the warranty on a firm twin mattress?
There is no standard warranty on firm twin mattresses, as warranty terms can vary significantly by manufacturer. Some manufacturers may offer a limited warranty that covers defects in materials or workmanship, while others may offer a full replacement or refund policy. It is important to read the warranty terms carefully before purchasing a firm twin mattress to ensure that you are covered in the event of a problem.
5. How long does a firm twin mattress last?
On average, a firm twin mattress lasts about 7 years.
Conclusion
There are many great firm twin mattress on the market. Our list of the best firm twin mattress will help you save time researching and choosing the best one for you.