Firm Premium Mattresses Compatible with Adjustable Bed Base | Flex‑Friendly Foam, Latex & Hybrid Sealy Mattresses

Firm mattresses give you a solid, supportive surface with minimal sink — keeping your spine aligned and making it easier to move and get in and out of bed. They're the top choice for back and stomach sleepers, heavier bodies, and anyone who finds softer beds uncomfortable. Compare every firm option below by brand, profile, and price.
Premium mattresses step up the materials, support systems, and comfort layers for a noticeably more refined sleep — without the top-tier price. They suit shoppers who want lasting quality and a more luxurious feel for their primary bedroom. Compare every premium option below by brand, type, and feel.
These mattresses are built to flex with adjustable bed bases — bending smoothly at the head and foot without damage — so you can raise, recline, and find your ideal position. Compare every adjustable-base-compatible option below by brand, type, and feel.

Sealy is a pioneering mattress brand known for its science-backed support and comfort. It was voted the #1 most trusted mattress brand in Canada, reflecting over a century of quality craftsmanship.

Shop 200+ mattresses from Serta, Beautyrest, Sealy, Tempur-Pedic, Springwall, and Stearns & Foster at National Mattress — available in Single/Twin through King sizes from $99 to $6,640. Choose from innerspring, euro-top, memory foam, hybrid, and latex constructions in four firmness levels from extra firm to plush. Every mattress is manufactured in Canadian factories using CertiPUR-US® certified foams and ships free across Canada with a 365-night sleep trial, price match guarantee, and manufacturer warranty coverage up to 25 years.

Firm Premium Mattresses Compatible with Adjustable Bed Base | Flex‑Friendly Foam, Latex & Hybrid Sealy
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  • CHIROFOAM™ 12" Luxury Firm Hybrid Mattress CHIROFOAM™ 12" Luxury Firm Hybrid Mattress brand icon
    • Cool Gel Infused Memory Foam
    • Firm Support Chirofoam
    • Pro Lumbar Support
    • Canadian Made 1000 Hi-Loft Pocket Coils
    • 15 Year Warranty
    Single/Twin In stock for fast delivery $442
    Twin XL In stock for fast delivery $561
    Double/Full In stock for fast delivery $569
    Queen $675
    Compare at $1,299
    King $862
    Online availability icon In-Stock Only 5 left!
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  • SEALY® Posturepedic® 800 Series 11.5" Firm Tight Top Mattress SEALY® Posturepedic® 800 Series 11.5" Firm Tight Top Mattress brand icon
    • CleanProtect™ Fabric
    • Quilt Stay True® Quilt with MoistureProtect™ Fibres
    • CertiPUR-US™ SealySupport™ Gel HD Foam
    • Posture Touch® Pocket Coils
    • StableEdge™ HD
    • Targeted Gel HD Foam
    Single/Twin $451
    Twin XL In stock for fast delivery $507
    Double/Full $520
    Queen In stock for fast delivery $588
    Compare at $1,399
    King $849
    Online availability icon In-Stock Only 3 left!
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  • CHIROFOAM™ 12" Luxury Firm Memory Foam Mattress CHIROFOAM™ 12" Luxury Firm Memory Foam Mattress brand icon
    • Cool Gel Infused Memory Foam
    • Firm Support Chirofoam
    • Pro Lumbar Support
    • Body Support Bio Foam Core
    • 15 Year Warranty
    Single/Twin In stock for fast delivery $514
    Twin XL In stock for fast delivery $710
    Double/Full In stock for fast delivery $721
    Queen In stock for fast delivery $856
    Compare at $1,599
    King In stock for fast delivery $1,108
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  • SEALY® Posturepedic® Plus 1000 Series 11.5" Firm Tight Top Mattress SEALY® Posturepedic® Plus 1000 Series 11.5" Firm Tight Top Mattress brand icon
    • CleanProtect™ Cover
    • SealyAir™ Fibres
    • CertiPUR-US™ SealyComfort™ Gel HD Foam
    • SealyResponse™ HD Pocket Coils
    • StableEdge™ HD
    • PROBACK® Quilt with Targeted GelBoost™ HD Memory Foam
    Single/Twin $593
    Twin XL In stock for fast delivery $663
    Double/Full $688
    Queen In stock for fast delivery $746
    Compare at $1,799
    King $988
    Online availability icon In-Stock Only 5 left!
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  • SERTA® Perfect Sleeper® 10.5" Firm Tight Top Mattress SERTA® Perfect Sleeper® 10.5" Firm Tight Top Mattress brand icon
    • 825 Edition Custom Support Coil System
    • CoolFeel Fabric™
    • Gel Band Support
    • Serta® Support Foam
    • PillowSoft® Foam
    • Designed and Made in Canada
    Single/Twin $565
    Twin XL In stock for fast delivery $610
    Double/Full $619
    Queen $665
    Compare at $1,399
    King $825
    Online availability icon In-Stock Only 2 left!
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  • SEALY® Posturepedic Plus® 1200 Series 12" Firm Euro Top Mattress SEALY® Posturepedic Plus® 1200 Series 12" Firm Euro Top Mattress brand icon
    • CleanProtect™ Cover
    • Sealy AirSense™ Fibres Topped with SealyIce™ Yarn
    • CertiPUR-US™ SealyComfort™ Gel HD Foam
    • Posture Grid® Coil System featuring PostureSense™ Nano Coils
    • SolidEdge™ PRO
    • PROBACK® Plus Quilt with Targeted GelSense™ HD Memory Foam
    Single/Twin $696
    Twin XL In stock for fast delivery $774
    Double/Full $805
    Queen $911
    Compare at $2,199
    King $1,230
    Online availability icon In-Stock Only 5 left!
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  • SEALY® Cocoon™ 10" Firm Memory Foam Mattress SEALY® Cocoon™ 10" Firm Memory Foam Mattress brand icon
    • Premium Fabric Cover
    • Perfect Fit Memory Foam
    • Personalized Comfort Layer
    • Essential Support Foam
    • 10 Year Warranty
    Twin XL $759
    Double/Full In stock for fast delivery $820
    Queen In stock for fast delivery $926
    Compare at $2,199
    King In stock for fast delivery $1,273
    Online availability icon In-Stock Only 7 left!
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  • SEALY® Posturepedic Plus® 1200 Series 14" Firm Euro Top Mattress SEALY® Posturepedic Plus® 1200 Series 14" Firm Euro Top Mattress brand icon
    • CleanProtect™ Cover
    • Sealy AirSense™ Fibres Topped with SealyIce™ Yarn
    • CertiPUR-US™ SealyComfort™ Gel HD Foam
    • Posture Grid® Coil System featuring PostureSense™ Nano Coils
    • SolidEdge™ PRO
    • PROBACK® Plus Quilt with Targeted GelSense™ HD Memory Foam
    Single/Twin $816
    Twin XL In stock for fast delivery $875
    Double/Full $894
    Queen $954
    Compare at $2,299
    King $1,233
    Online availability icon In-Stock Only 5 left!
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  • SERTA® Perfect Sleeper® 13.5" Firm Pillow Top Mattress SERTA® Perfect Sleeper® 13.5" Firm Pillow Top Mattress brand icon
    • 850 Edition Custom Support Zoned Coil System
    • CoolFeel Fabric™
    • Serta® Antimicrobial Fibre
    • Cool Twist® Gel Memory Foam
    • Serta® Support Foam
    • Designed and Made in Canada
    Single/Twin In stock for fast delivery $847
    Twin XL In stock for fast delivery $889
    Double/Full $902
    Queen $953
    Compare at $1,999
    King $1,117
    Online availability icon In-Stock Only 4 left!
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  • SERTA® Perfect Sleeper® 12" Firm Hybrid Mattress SERTA® Perfect Sleeper® 12" Firm Hybrid Mattress brand icon
    • 1000 Series 3-Zoned Coil System
    • CoolFeel Fabric™
    • Serta® Support Foam
    • Cool Twist® Gel Memory Foam
    • Hybrid Design
    • Designed and Made in Canada
    Single/Twin $840
    Twin XL In stock for fast delivery $896
    Double/Full $909
    Queen $953
    Compare at $1,999
    King $1,117
    Online availability icon In-Stock Only 4 left!
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  • SERTA® Perfect Sleeper® Premium 15" Firm Pillow Top Mattress SERTA® Perfect Sleeper® Premium 15" Firm Pillow Top Mattress brand icon
    • 1000 Series 3-Zoned Coil System
    • CoolFeel Fabric™
    • Serta® Antimicrobial Fibre
    • Cool Twist® Gel Memory Foam
    • Serta® Support Foam
    • Designed and Made in Canada
    Single/Twin In stock for fast delivery $980
    Twin XL In stock for fast delivery $1,032
    Double/Full $1,047
    Queen $1,100
    Compare at $2,299
    King $1,266
    Online availability icon In-Stock Only 7 left!
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  • CHIROFOAM™ 12" Luxury Firm Hybrid Mattress - Single/Twin CHIROFOAM™ 12" Luxury Firm Hybrid Mattress - Single/Twin brand icon
    • Cool Gel Infused Memory Foam
    • Firm Support Chirofoam
    • Pro Lumbar Support
    • Canadian Made 1000 Hi-Loft Pocket Coils
    • 15 Year Warranty
    Single/Twin In stock for fast delivery $442
    Compare at $899
    Online availability icon In-Stock Only 1 left!
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