Firm Back Sleeper Temperature Regulating Yes 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.
Back sleepers do best on a mattress that supports the lower back while gently following the spine's natural curve — typically a medium to medium-firm feel. The options below balance support and pressure relief for back sleepers. Compare them by brand, feel, and profile.
Temperature-regulating mattresses balance heat and airflow to hold a neutral, consistent sleep temperature through the night — not too hot, not too cold. They suit sleepers whose temperature swings. Compare every 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 Back Sleeper Temperature Regulating Yes Sealy
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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!
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery as soon as Tomorrow, Jun 9
    Pickup available icon Only Pickup available to
  • 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 6 left!
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery as soon as Tomorrow, Jun 9
    Pickup available icon Only Pickup available to
  • 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!
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery as soon as Tomorrow, Jun 9
    Pickup available icon Only Pickup available to
  • 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!
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery as soon as Tomorrow, Jun 9
    Pickup available icon Only Pickup available to
  • SEALY® Posturepedic® Natural Origins 13.5" Firm Tight Top Latex Mattress SEALY® Posturepedic® Natural Origins 13.5" Firm Tight Top Latex Mattress brand icon
    • OEKO-TEX Certified BioGel Latex
    • SealyCool Fibres with Silk & Wool
    • Organic Cotton Infused with Bamboo
    • Targeted ComfortSense Memory Foam
    • SealySupport HD Core
    • CertiPUR-US® Approved Foam
    Single/Twin In stock for fast delivery $890
    Twin XL In stock for fast delivery $926
    Double/Full In stock for fast delivery $940
    Queen In stock for fast delivery $998
    Compare at $2,399
    King $1,322
    Online availability icon In-Stock
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery as soon as Tomorrow, Jun 9
    Pickup available icon Only Pickup available to
  • SEALY® Posturepedic Luxury® 13.5" Firm Hybrid Tight Top Mattress SEALY® Posturepedic Luxury® 13.5" Firm Hybrid Tight Top Mattress brand icon
    • SealyMAX™ Core System featuring SealyResponse™ PRO & SolidSupport™ Pocket Coils
    • GelSense™ MAX Memory Foam
    • SealySupport™ Gel HD Foam
    • SupremeLoft™ Quilt featuring Silk & Wool
    • SealyCool™ Fabric
    • SolidEdge™ PRO Coil Edge
    Twin XL In stock for fast delivery $929
    Double/Full $943
    Queen $1,054
    Compare at $2,499
    King $1,307
    Online availability icon In-Stock Only 4 left!
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery as soon as Tomorrow, Jun 9
    Pickup available icon Only Pickup available to
  • SEALY® Posturepedic Luxury® 14.5" Firm Hybrid Mattress SEALY® Posturepedic Luxury® 14.5" Firm Hybrid Mattress brand icon
    • SealyCool™ Fabric Premium Ultra-Stretch Cover
    • Silhouette™ Memory Foam
    • SealyMAX™ Core System featuring SealyResponse™ PRO & SolidSupport™ Pocket Coils
    • SolidEdge™ PRO Coil Edge
    • Sealy ComfortSense™ Memory Foam with SealyCool™
    • Zoned Pocket Coil Support
    Twin XL In stock for fast delivery $1,577
    Double/Full In stock for fast delivery $1,609
    Queen In stock for fast delivery $1,694
    Compare at $3,999
    King $1,990
    Online availability icon In-Stock Only 8 left!
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery as soon as Tomorrow, Jun 9
    Pickup available icon Only Pickup available to
  • SEALY® Posturepedic® 800 Series 11.5" Firm Tight Top Mattress - Single/Twin SEALY® Posturepedic® 800 Series 11.5" Firm Tight Top Mattress - Single/Twin 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
    Compare at $1,099
    Online availability icon Backorder Available
    In-Store availability icon On Display:
    Estimated delivery icon Estimated free delivery on Tuesday, Jun 23
  • SEALY® Posturepedic® 800 Series 11.5" Firm Tight Top Mattress - Twin XL SEALY® Posturepedic® 800 Series 11.5" Firm Tight Top Mattress - Twin XL 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
    Twin XL In stock for fast delivery $507
    Compare at $1,299
    Online availability icon In-Stock Only 1 left!
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery as soon as Tomorrow, Jun 9
    Pickup available icon Only Pickup available to
  • SEALY® Posturepedic® 800 Series 11.5" Firm Tight Top Mattress - Double/Full SEALY® Posturepedic® 800 Series 11.5" Firm Tight Top Mattress - Double/Full 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
    Double/Full $520
    Compare at $1,299
    Online availability icon Backorder Available
    In-Store availability icon On Display:
    Estimated delivery icon Estimated free delivery on Tuesday, Jun 23
  • SEALY® Posturepedic® 800 Series 11.5" Firm Tight Top Mattress - Queen SEALY® Posturepedic® 800 Series 11.5" Firm Tight Top Mattress - Queen 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
    Queen In stock for fast delivery $588
    Compare at $1,399
    Online availability icon In-Stock Only 2 left!
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery as soon as Tomorrow, Jun 9
    Pickup available icon Only Pickup available to
  • SEALY® Posturepedic® Plus 1000 Series 11.5" Firm Tight Top Mattress - Single/Twin SEALY® Posturepedic® Plus 1000 Series 11.5" Firm Tight Top Mattress - Single/Twin 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
    Compare at $1,499
    Online availability icon Backorder Available
    In-Store availability icon On Display:
    Estimated delivery icon Estimated free delivery on Tuesday, Jun 23

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