Firm Organic Materials All 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.
Mattresses made with organic materials — certified organic cotton, wool, or latex — for a cleaner, low-chemical sleep surface. They suit shoppers prioritizing natural materials and sensitive sleepers. Compare every organic option below by brand, type, and feel.

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 Organic Materials All Mattresses
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  • EVERGREEN™ 10" Firm Organic Latex Foam Mattress EVERGREEN™ 10" Firm Organic Latex Foam Mattress brand icon
    • Open Cell Bio Foam Core
    • Organic Latex Comfort Layer
    • Bio-Foam natural foam content support layers
    • Organic Cotton Quilt
    • 10 Year Warranty
    • Made In Toronto, Canada
    Single/Twin $402
    Twin XL $548
    Double/Full $556
    Queen $643
    Compare at $1,199
    King SOLD OUT
    Online availability icon In-Stock
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  • EVERGREEN™ 14" Euro-Top Firm Organic Latex Mattress EVERGREEN™ 14" Euro-Top Firm Organic Latex Mattress brand icon
    • 1000 Hi-Loft Pocket Coil with Foam Encased Perimeter
    • Organic Latex Comfort Layer
    • Bio-Foam natural foam content support layers
    • Organic Cotton Quilt with Organic Latex and Organic Wool
    • 10 Year Warranty
    • Made In Toronto, Canada
    Single/Twin $624
    Twin XL $731
    Double/Full $743
    Queen SOLD OUT
    Compare at $1,499
    King SOLD OUT
    Online availability icon In-Stock Only 8 left!
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  • 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 $831
    Twin XL $864
    Double/Full $878
    Queen $923
    Compare at $1,899
    King $1,235
    Online availability icon In-Stock
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  • BEAUTYREST® Quintessence™ 13" Firm Tight Top Mattress BEAUTYREST® Quintessence™ 13" Firm Tight Top Mattress brand icon
    • Beautyrest® T3 Pocketed Coil Technology
    • WinterCool™ Tri-Fiber with alpaca, cashmere, and silk.
    • WinterCool™ Sleep System with 4 distinct cooling technologies.
    • WinterCool™ Carbon Foam and GelTouch® Foam
    Twin XL $1,269
    Queen $1,425
    Compare at $2,999
    King SOLD OUT
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  • EVERGREEN 100% Certified Organic 10" Firm Latex Mattress EVERGREEN 100% Certified Organic 10" Firm Latex Mattress brand icon
    • 100% Certified Natural Organic Latex
    • Global Organic Latex Standard – Certified 100% Natural
    • Eco-Institute – No Fillers or Hazardous Particles
    • Oeko-Tex Standard 100 – No Harmful Substances
    • ABC Research Laboratories – Certified Antimicrobial
    Single/Twin $1,384
    Twin XL $1,877
    Double/Full $1,906
    Queen $1,935
    Compare at $3,599
    King $2,650
    Online availability icon In-Stock
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  • BEAUTYREST® Quintessence™ 15" Luxury FIrm Pillow Top Mattress BEAUTYREST® Quintessence™ 15" Luxury FIrm Pillow Top Mattress brand icon
    • Beautyrest® T3 Pocketed Coil Technology
    • WinterCool™ Tri-Fiber with alpaca, cashmere, and silk.
    • WinterCool™ Sleep System with 4 distinct cooling technologies.
    • WinterCool™ Carbon Foam and GelTouch® Foam
    Twin XL $1,424
    Queen SOLD OUT
    Compare at $3,299
    King SOLD OUT
    Online availability icon In-Stock Only 7 left!
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  • SERTA® iComfort ECO™ Latex 14" Firm Memory Foam Mattress SERTA® iComfort ECO™ Latex 14" Firm Memory Foam Mattress brand icon
    • CoolTemp™ Cover powered by REPREVE®
    • Terra Fusion™ Memory Foam
    • DeepReaction® Max Gel Memory Foam
    • Latex Foam
    • CertiPUR-US® certified foams.
    • 100% Canada Assembled
    Queen $1,640
    Compare at $3,999
    Online availability icon In-Stock Only 1 left!
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  • SERTA® iComfort® PRO 12.5" Firm Latex Mattress SERTA® iComfort® PRO 12.5" Firm Latex Mattress brand icon
    • CoolFeel™ Pro System
    • 5 ZoneResponse™ Design
    • Graphite-Infused True Response™ Latex Foam
    • True Response™ Latex Foam
    • Derived from 100% Natural Latex
    • 100% Canada Assembled
    Twin XL $1,879
    Queen SOLD OUT
    Compare at $4,799
    King SOLD OUT
    Online availability icon In-Stock Only 7 left!
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  • BEAUTYREST® Centennial® 13" Tight Top Firm Mattress BEAUTYREST® Centennial® 13" Tight Top Firm Mattress brand icon
    • 1850 T3 Triple Stranded Pocketed Coil® and Micro Coil Technology
    • SurfaceTouch™ Gel Memory Foam
    • Self-Response™ Latex
    • Beautyrest® Gel Support Foam
    • Sleep Climate™ Surface enhanced with cooling yarn
    Single/Twin SOLD OUT
    Twin XL $2,109
    Double/Full SOLD OUT
    Queen SOLD OUT
    Compare at $3,299
    King SOLD OUT
    Online availability icon In-Stock Only 7 left!
    In-Store availability icon On Display:
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  • SERTA® iComfort® PRO 14.5" Firm Euro Top Latex Mattress SERTA® iComfort® PRO 14.5" Firm Euro Top Latex Mattress brand icon
    • CoolFeel™ Pro System
    • 5 ZoneResponse™ Design
    • 2X Graphite-Infused True Response™ Latex Foam
    • 2X True Response™ Latex Foam
    • Derived from 100% Natural Latex
    • 100% Canada Assembled
    Twin XL $2,799
    Queen $3,499
    Compare at $5,299
    King SOLD OUT
    Online availability icon In-Stock Only 9 left!
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  • SERTA® iComfort® PRO 12.5" Firm Latex Mattress SERTA® iComfort® PRO 12.5" Firm Latex Mattress brand icon
    • CoolFeel™ Pro System
    • 5 ZoneResponse™ Design
    • Graphite-Infused True Response™ Latex Foam
    • True Response™ Latex Foam Core
    • Derived from 100% Natural Latex
    • 100% Canada Assembled
    Twin XL $5,399
    Queen $5,999
    Compare at $8,899
    King $6,999
    Online availability icon In-Stock
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  • EVERGREEN™ 10" Firm Organic Latex Foam Mattress - Single/Twin EVERGREEN™ 10" Firm Organic Latex Foam Mattress - Single/Twin brand icon
    • Open Cell Bio Foam Core
    • Organic Latex Comfort Layer
    • Bio-Foam natural foam content support layers
    • Organic Cotton Quilt
    • 10 Year Warranty
    • Made In Toronto, Canada
    Single/Twin $402
    Compare at $599
    Online availability icon In-Stock Only 4 left!
    In-Store availability icon On Display:
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