Firm Adjustable Bed Compatible Mattresses Mattress Selector

Firm mattresses give you the most support of our everyday comfort levels — a solid, stable surface that keeps your spine aligned instead of sinking in. Firm is the go-to for back and stomach sleepers, heavier-weight sleepers who need extra support, and anyone looking for orthopedic, back-friendly comfort; side sleepers or those who like a softer feel may prefer our medium or plush options. Choose from tight-top, foam, euro-top and hybrid builds across Sealy, Serta, Beautyrest, Stearns & Foster, iComfort, Tempur-Pedic, Chirofoam and our own NM line — from budget-friendly models at $59 to premium, with free delivery across Canada. • Feel: firm gives a solid, supportive surface with minimal sink-in • Best for: back and stomach sleepers, heavier-weight sleepers, and orthopedic / back-pain support • Consider softer if you sleep on your side or want more cushioning — see our medium or plush options • Constructions: tight-top (most firm beds), foam, euro-top and hybrid • Brands: Sealy, Serta, Beautyrest, Stearns & Foster, iComfort, Tempur-Pedic, Chirofoam, Springwall & NM • Prices: from $59 (budget) to premium — our widest price range • Want the firmest feel? See our extra-firm mattresses
Not every mattress can bend with an adjustable base — but these can. Every mattress here is built to flex with the head and foot articulation of an adjustable base without damaging the comfort layers, so you can read, relax in Zero-Gravity or elevate your legs with confidence. In fact, over 90% of our mattresses are adjustable-compatible, spanning memory foam, hybrid and pocket-coil constructions from every brand — NM, Sealy, Serta, Beautyrest, Tempur-Pedic, Stearns & Foster and more — at every budget from about $109 to premium. Foam and hybrid models flex most easily, while rigid, thick tight-top innersprings generally don't. Pair any of these with one of our adjustable bases, and every mattress comes with a 365-night sleep trial and free delivery across Canada. • What this means: mattresses built to flex with an adjustable base's head & foot articulation • Over 90% of our mattresses are adjustable-compatible — every brand, every budget ($109+) • Best constructions for adjustable bases: memory foam, hybrid and pocket-coil • What usually won't work: rigid, thick tight-top innersprings that don't bend • Pairs with our adjustable bases (including split-king for independent sides) • Every order: 365-night sleep trial, price-match guarantee & free Canada-wide delivery
Firm Adjustable Bed Compatible Mattresses Mattress Selector

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Clear all Firm Compatible with Adjustable Bed Base

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Firm Compatible with Adjustable Bed Base Clear all
  • EVERGREEN ecoRest 10" Firm Certified Organic Latex Mattress
    CLEARANCE FLASH SALE LIMITED STOCK
    EVERGREEN ecoRest 10" Firm Certified Organic Latex Mattress EVERGREEN ecoRest 10" Firm Certified Organic Latex Mattress brand icon
    FIRM
    • Organic Latex
    • Cool Gel Foam
    • Organic Cotton Fabric
    • Open Cell Foam Core
    Single/Twin SOLD OUT
    Double/Full In stock for fast delivery $455
    Queen SOLD OUT
    Compare at $1,199
    Twin XL In stock for fast delivery $548
    King SOLD OUT
    Online availability icon In-Stock Only 5 left!
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  • SERTA® Perfect Sleeper® 10.5" Firm Tight Top Mattress
    CLEARANCE TOP RATED LIMITED STOCK
    Serta Perfect Sleeper 10.5-inch firm tight-top mattress, white quilted top, charcoal-navy sides SERTA® Perfect Sleeper® 10.5" Firm Tight Top Mattress brand icon
    FIRM
    • 825 Edition Custom Support Coil System
    • CoolFeel Fabric™
    • Gel Band Support
    • Serta® Support Foam
    • PillowSoft® Foam
    • Designed and Made in Canada
    Single/Twin SOLD OUT
    Twin XL In stock for fast delivery $610
    Double/Full SOLD OUT
    Queen SOLD OUT
    Compare at $1,399
    King SOLD OUT
    Online availability icon In-Stock Only 2 left!
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  • SERTA® Perfect Sleeper® 12" Luxury Firm Tight Top Mattress
    CLEARANCE LIMITED STOCK
    Serta Perfect Sleeper 12-inch luxury-firm tight-top mattress, white blue-wave top, charcoal-navy sides SERTA® Perfect Sleeper® 12" Luxury Firm Tight Top Mattress brand icon
    FIRM
    • 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 SOLD OUT
    Twin XL In stock for fast delivery $824
    Double/Full SOLD OUT
    Queen SOLD OUT
    Compare at $1,799
    King SOLD OUT
    Online availability icon In-Stock Only 5 left!
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  • SERTA® Perfect Sleeper® 13.5" Firm Pillow Top Mattress
    CLEARANCE TOP RATED LIMITED STOCK
    Serta Perfect Sleeper 13.5-inch firm pillow-top, light-blue burst quilting, charcoal sides SERTA® Perfect Sleeper® 13.5" Firm Pillow Top Mattress brand icon
    FIRM
    • 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 SOLD OUT
    Queen SOLD OUT
    Compare at $1,999
    King SOLD OUT
    Online availability icon In-Stock Only 4 left!
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  • SERTA® Perfect Sleeper® 12" Firm Hybrid Mattress
    CLEARANCE BEST IN CLASS TOP RATED
    Serta Perfect Sleeper 12-inch firm hybrid mattress, all-blue sunburst tight-top, navy sides SERTA® Perfect Sleeper® 12" Firm Hybrid Mattress brand icon
    FIRM
    • 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 SOLD OUT
    Twin XL In stock for fast delivery $896
    Double/Full SOLD OUT
    Queen SOLD OUT
    Compare at $1,999
    King SOLD OUT
    Online availability icon In-Stock Only 4 left!
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  • SERTA® Perfect Sleeper® Premium 15" Firm Pillow Top Mattress
    CLEARANCE BEST IN CLASS TOP RATED
    Serta Perfect Sleeper Premium 15-inch firm pillow-top, deep-blue burst quilting, charcoal sides SERTA® Perfect Sleeper® Premium 15" Firm Pillow Top Mattress brand icon
    FIRM
    • 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 SOLD OUT
    Queen SOLD OUT
    Compare at $2,299
    King SOLD OUT
    Online availability icon In-Stock Only 7 left!
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  • BEAUTYREST® Quintessence™ 13" Firm Tight Top Mattress
    CLEARANCE LIMITED STOCK
    Beautyrest Quintessence 13-inch firm tight-top mattress, cream floral cover, charcoal woven side panel BEAUTYREST® Quintessence™ 13" Firm Tight Top Mattress brand icon
    FIRM
    • 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 In stock for fast delivery $1,269
    Queen SOLD OUT
    Compare at $2,999
    King SOLD OUT
    Online availability icon In-Stock Only 7 left!
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  • BEAUTYREST® Quintessence™ 15" Luxury FIrm Pillow Top Mattress
    CLEARANCE BEST IN CLASS LIMITED STOCK
    Beautyrest Quintessence 15-inch luxury firm pillow-top mattress, cream floral cover, charcoal woven side BEAUTYREST® Quintessence™ 15" Luxury FIrm Pillow Top Mattress brand icon
    FIRM
    • 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 In stock for fast delivery $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
    CLEARANCE FLASH SALE EXCLUSIVE OFFER
    Serta iComfort ECO 14-inch firm latex memory foam mattress, wavy top, navy side, three cooling snowflakes SERTA® iComfort ECO™ Latex 14" Firm Memory Foam Mattress brand icon
    FIRM
    • CoolTemp™ Cover powered by REPREVE®
    • Terra Fusion™ Memory Foam
    • DeepReaction® Max Gel Memory Foam
    • Latex Foam
    • CertiPUR-US® certified foams.
    • 100% Canada Assembled
    Queen In stock for fast delivery $1,640
    Compare at $3,999
    Online availability icon In-Stock Only 1 left!
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Upgrade your sleep at National Mattress

Discover a mattress that transforms your sleep into a truly rejuvenating experience. We offer a wide variety of options to suit every sleep style and preference, ensuring a better night's sleep.

Why Choose Us?

  • Variety: From plush to firm, we have options for every body type and sleep style.
  • Quality: Trusted brands and top-notch materials for long-lasting comfort.
  • Sleep Trials & Warranties: Enjoy peace of mind with flexible trials and warranties.
  • Expert Advice: Get personalized recommendations from our sleep specialists.

Mattress Selection Includes

  • Memory Foam: Contours to your body for personalized comfort and pressure relief.
  • Hybrid: Combines responsive springs with foam for balanced support and comfort.
  • Innerspring: Provides firm support, bounce, and cooling airflow.
  • Latex: Hypoallergenic, eco-friendly, and exceptionally comfortable.
  • Adjustable Beds: Customize your sleep position for optimal comfort.
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