10 Best Firm Mattress of August 2025

• Queen size bed in a box: For deep sleep you've always dreamed of, this body contouring memory foam mattress delivers; 12 inch mattress comes compressed and rolled in a box for your convenience
• Sleep soundly: Designed with layers of memory foam for firm support and pressure relief, all with an ultra plush feel. The support foam core reduces motion transfer for peaceful, undisturbed sleep
• Maintenance free: Made of hypoallergenic material to keep out dust mites, pollen, mold and pet dander—perfect for kids or adults who suffer from allergies
• Queen size: Measures 59” W x 79” D x 12” H and is compatible with most full bed frames
• Ready for instant enjoyment: Arrives in a box. Simply unbox, cut the protective wrap, unroll and watch the mattress expand. Mattress is safe to sleep on immediately but can take 72+ hours for any risidual odors from packaging to dissipate and for mattress to completely expand based on ambient room temperature, humidity, air pressure & ventilation.

Signature Design by Ashley

• FIRM SUPPORT, PLUS MORE - Our firmest mattress ever is engineered with 10% more heavy gauge steel iCoil pocket innersprings for added stability and extra firmness, ideal for stomach sleepers and plus-sized individuals
• SUPPORTIVE FOAM & POCKET SPRINGS - 1.25 inches soft comfort foam, 1 inch durable high-density foam and 7.5 motion-isolating iCoil pocket springs with a quilted jacquard cover
• CERTIPUR US CERTIFIED - Highest quality foam is CertiPUR-US Certified for durability, performance, and content
• EXPERTLY PACKAGED - Our technology allows this mattress to be efficiently compressed into one box that’s easily shipped and maneuvered into the bedroom; simply unbox, unroll and this mattress does the rest, expanding to its original shape within 72 hours
• Worry-free 10 year limited warranty included; twin mattress supports a maximum weight of 250 lbs, while all other sizes can support up to 500 lbs
• 1 .5 inch top Comfort Foam layer, 1 inch High Density Foam Support layer
• 7.5 inch base layer of over 10% more individually wrapped coils assures no motion transfer
• Extra firm support
• Only the Highest Quality of Foam - Foam is CertiPUR-US Certified for durability, performance, and content
• Worry free 10 year limited warranty

Zinus

• Full size bed in a box: For supportive, dreamy sleeping, this mattress brings it home with comfortable layers; Plus, it comes in a box, so it's easier than ever to get a better night's rest
• Hybrid mattress: Mattress is designed with gel memory foam, upholstery grade comfort support foam, and 360 individual power packed wrapped coils for maximum lumbar support. Quilt foam gives you that soft, cozy comfort you crave
• Maintenance free: Made of hypoallergenic material to keep out dust mites, pollen, mold and pet dander—perfect for kids or adults who suffer from allergies
• Full size: Measures 53.25" W x 74.5" D x 12" H and is compatible with most full bed frames
• Ready for instant enjoyment: Arrives in a box. Simply unbox, cut the protective wrap, unroll and watch the mattress expand. Mattress is safe to sleep on immediately but can take 72+ hours for any risidual odors from packaging to dissipate and for mattress to completely expand based on ambient room temperature, humidity, air pressure & ventilation.

Signature Design by Ashley

• 8 inch hybrid mattress combine hypallergenic memory foam with the traditional support of an innerspring mattress for a medium-firm feel perfect for kids rooms, guest beds, or an affordable low-profile option
• A plush layer of memory foam helps align the spine to minimize pressure points for increased comfort
• Finished with a cozy knit cover, this mattress is compressed as a bed in a box for convenient delivery and setup
• Available in a medium firm 8 inch profile, a medium 10 inch profile, or a plush 12 inch profile that also features gel infusions and individually encased coils
• Packaging process may leave small brown flecks called carbons in the mattress packaging; These carbons are harmless pieces of plastic and will not stick to your mattress; 10 year limited warranty

Linenspa

• Swiss Ortho Sleep, Most Popular Pocket Encased Coil Spring MATTRESS is a Phenomenal High-Quality 12-Inch Certified Independently & Individually Wrapped Pocketed Encased Coil Pocket Spring Contour MATTRESS. This Swiss Ortho Sleep Mattress is Temperature Sensitive, Body Forming Super Long Lasting High Quality & Extremely Durable, for Many Years of Undisturbed Night's Sleep,
• Each Seperate Pocketed Coil is Individually & Independantly Wrapped to Provide a Support System for an Individualized Comfort by Contouring Precisely to each Person's Body Perfectly. It Also Doesn't Transfer Motion, for a Peaceful Undisturbed Sleep Even if Your Partner Moves at Night.
• Our Signature Motion Isolation Pocketed Encased Coil Mattress is Made for Uptimum Deep Comforting Pressure Relief Sleep. By Relieving The Pressure Points, Pocket Coil Mattresses Allow Blood & Much Needed Oxygen to Circulate & Flow More Efficiently Throughout Our Bodies. This Mattress Also Contains a Bamboo Cover Which Allows Breathability all throughout.
• Swiss Ortho Sleep Always Comes with a 10 Year Warranty,
• It is Delivered to you in an Easy and Convenient Compressed Packing.

Swiss Ortho Sleep

• Firm - Provides Strong Pinpointed Support
• Adjusts to Your Body Instantly - Latex Foam Naturally Stays Cool
• Made of Natural Latex Harvested from Organically Grown Rubber Trees
• GOLS Certified Organic (Global Organic Latex Standard)
• Oeko-Tex Standard 100 - Greenguard Gold - ecoInstitut Certified

Sleep On Latex

• MEMORY FOAM MATTRESS TOPPER—Designed with the same pressure-relieving TEMPUR material found in our mattresses, this 3 inch memory foam mattress topper conforms to your body to deliver more restful sleep.
• ADAPTS TO YOUR BODY—TEMPUR material responds to your body’s temperature, weight, and shape for precise, personalized comfort and support.
• WASHABLE COVER—Say goodbye to dirt, dust, allergens, and dust-mites with a breathable, machine-washable cover.
• MULTI-USE TOPPER—This conforming mattress topper is not only the perfect way to upgrade your own bed, but also enhances comfort in guest rooms, dorm rooms, for travel, and more.
• DURABLE & RELIABLE—More durable than the average memory foam mattress topper, our innovative, proprietary material is designed for years of long-lasting comfort that won’t let you down.

Tempur-Pedic

• This mattress features an 8-inch firm feel ideal for older kids and teens in need of a firm and supportive mattress upgrade
• Gel infused memory foam regulates temperature while conforming to the body to ease pressure points
• The 1.5 inch ventilated gel memory foam top layer creates a cooler sleep experience than traditional memory foam by helping to regulate body temperature and increase circulation
• 6.5 inches of dense bamboo charcoal infused support foam provide extra stability and full body support
• We only use CertiPUR US certified memory foam to ensure your uncompromising safety and comfort

LUCID

• This mattress features a 10-inch FIRM feel ideal for side, back, and stomach sleepers that crave more support and less sink
• Gel infused memory foam regulates temperature while conforming to the body to ease pressure points
• The 2.5-inch ventilated gel memory foam top layer creates a cooler sleep experience than traditional memory foam by helping to regulate body temperature and increase circulation
• 1 inch of transition foam and 6.5 inches of dense bamboo charcoal infused support foam provide extra stability and full body support
• Compressed, rolled, and shipped in a box for simple setup; easily fits through narrow hallways and staircases
• We only use CertiPUR US certified memory foam to ensure your uncompromising safety and comfort
• Dimensions: 60" x 80" x 10"

LUCID

• 3-layer comfort: 2-inch cooling gel-infused alternative-latex top layer, 3-inch support-foam middle layer with airflow channels for breathability, and 7-inch durable foam base
• Instant support: responsive top layer made of LURAcor alternative-latex foam offers more bouncy rebound and less “sink” compared to traditional memory foam; helps keep spine in alignment and provides relief to shoulders, hips, and other pressure points
• Firm feel: promotes a restful night's sleep for any body type and sleeping position (front, side, or back)
• Premium quality: hypoallergenic, CertiPUR-US certified, and made in the USA of domestic and imported parts; luxurious quilted cover for extra softness
• Convenience and warranty: vacuum packed and shipped directly to ensure simple setup; please allow up to 72 hours for mattress to reach full height; backed by an AmazonBasics 10-year limited warranty

AmazonBasics