Firm iComfort® 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.
The Serta iComfort® mattress collection offers luxurious comfort with advanced cooling technology and pressure-relieving memory foam. These premium mattresses include both all-foam and hybrid models, delivering a cooler, more restorative sleep experience for Canadian shoppers.

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 iComfort® All Mattresses
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  • SERTA® iComfort® 11.5" Firm Memory Foam Mattress SERTA® iComfort® 11.5" Firm Memory Foam Mattress brand icon
    • CoolFeel™ Fabric
    • 5 ZoneResponse™ Design
    • Perfect Conform™ Graphite Memory Foam
    • iComfort® Gel Memory Foam
    • CertiPUR-US® certified foams.
    • 100% Canada Assembled
    Twin XL $1,299
    Double/Full SOLD OUT
    Queen SOLD OUT
    Compare at $2,599
    King SOLD OUT
    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 5
    Pickup available icon Only Pickup available to
  • 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!
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery as soon as Tomorrow, Jun 5
    Pickup available icon Only Pickup available to
  • SERTA® iComfort® 14" Firm Memory Foam Mattress SERTA® iComfort® 14" Firm Memory Foam Mattress brand icon
    • CoolFeel™ Fabric
    • 5 ZoneResponse™ Design
    • Perfect Conform™ Graphite Memory Foam
    • Deep Reaction® Max Gel Memory Foam
    • CertiPUR-US® certified foams.
    • 100% Canada Assembled
    Twin XL $1,799
    Double/Full $1,899
    Queen $1,999
    Compare at $3,899
    King $2,499
    Online availability icon In-Stock
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery as soon as Tomorrow, Jun 5
    Pickup available icon Only Pickup available to
  • SERTA® iComfort® 11.5" Firm Memory Foam Mattress - Twin XL SERTA® iComfort® 11.5" Firm Memory Foam Mattress - Twin XL brand icon
    • CoolFeel™ Fabric
    • 5 ZoneResponse™ Design
    • Perfect Conform™ Graphite Memory Foam
    • iComfort® Gel Memory Foam
    • CertiPUR-US® certified foams.
    • 100% Canada Assembled
    Twin XL $1,299
    Compare at $2,299
    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 5
    Pickup available icon Only Pickup available to
  • SERTA® iComfort ECO™ Latex 14" Firm Memory Foam Mattress - Queen SERTA® iComfort ECO™ Latex 14" Firm Memory Foam Mattress - Queen 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!
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery as soon as Tomorrow, Jun 5
    Pickup available icon Only Pickup available to
  • SERTA® iComfort® 14" Firm Memory Foam Mattress - Twin XL SERTA® iComfort® 14" Firm Memory Foam Mattress - Twin XL brand icon
    • CoolFeel™ Fabric
    • 5 ZoneResponse™ Design
    • Perfect Conform™ Graphite Memory Foam
    • Deep Reaction® Max Gel Memory Foam
    • CertiPUR-US® certified foams.
    • 100% Canada Assembled
    Twin XL $1,799
    Compare at $3,599
    Online availability icon In-Stock Only 7 left!
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery as soon as Tomorrow, Jun 5
    Pickup available icon Only Pickup available to
  • SERTA® iComfort® 14" Firm Memory Foam Mattress - Double/Full SERTA® iComfort® 14" Firm Memory Foam Mattress - Double/Full brand icon
    • CoolFeel™ Fabric
    • 5 ZoneResponse™ Design
    • Perfect Conform™ Graphite Memory Foam
    • Deep Reaction® Max Gel Memory Foam
    • CertiPUR-US® certified foams.
    • 100% Canada Assembled
    Double/Full $1,899
    Compare at $3,699
    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 5
    Pickup available icon Only Pickup available to
  • SERTA® iComfort® 14" Firm Memory Foam Mattress - Queen SERTA® iComfort® 14" Firm Memory Foam Mattress - Queen brand icon
    • CoolFeel™ Fabric
    • 5 ZoneResponse™ Design
    • Perfect Conform™ Graphite Memory Foam
    • Deep Reaction® Max Gel Memory Foam
    • CertiPUR-US® certified foams.
    • 100% Canada Assembled
    Queen $1,999
    Compare at $3,899
    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 5
    Pickup available icon Only Pickup available to
  • SERTA® iComfort® 14" Firm Memory Foam Mattress - King SERTA® iComfort® 14" Firm Memory Foam Mattress - King brand icon
    • CoolFeel™ Fabric
    • 5 ZoneResponse™ Design
    • Perfect Conform™ Graphite Memory Foam
    • Deep Reaction® Max Gel Memory Foam
    • CertiPUR-US® certified foams.
    • 100% Canada Assembled
    King $2,499
    Compare at $4,499
    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 5
    Pickup available icon Only Pickup available to
  • OPEN BAG - SERTA® iComfort ECO™ Latex 14" Firm Memory Foam Mattress - Queen OPEN BAG - SERTA® iComfort ECO™ Latex 14" Firm Memory Foam Mattress - Queen 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 $1,525
    Compare at $3,999
    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 5
    Pickup available icon Only Pickup available to

10 Items

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