Medium Mattresses Foam Core/No Coils Mattresses Compatible with Adjustable Bed Base | Flex‑Friendly Foam, Latex & Hybrid Temperature‑Regulating Mattresses | Year‑Round Comfort & Balance Evergreen Mattresses

Medium-firmness mattresses — often called medium-firm — sit right between plush and firm, which is why they're the most popular and versatile feel we carry. You get enough cushioning to relieve pressure with enough support to keep your spine aligned, making medium a safe choice for back sleepers, combination sleepers who change positions through the night, and couples who need a compromise between two preferences. Shop medium models from Sealy, Serta, Beautyrest, Stearns & Foster, iComfort and Tempur-Pedic across memory foam, hybrid, euro-top, pillow-top and tight-top builds — with free delivery across Canada. • Feel: medium sits between plush and firm — balanced and the most versatile of our four comfort levels • Also called "medium-firm" — the middle of the firmness scale • Best for: back sleepers, combination sleepers, couples, and most body types • Consider plush if you sleep on your side; firm if you sleep on your stomach or want more support • Constructions: euro-top, tight-top, pillow-top, memory foam and hybrid • Brands: Sealy, Serta, Beautyrest, Stearns & Foster, iComfort, Tempur-Pedic, Springwall & NM • Prices: from $171 to premium
Foam core mattresses are built entirely from foam with no innerspring coils, for quiet, motion-free sleep and a consistent, supportive surface. They're lightweight, pair perfectly with platform and adjustable bases, and suit couples sensitive to movement. Compare every all-foam, no-coil option below by brand 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.
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.

Evergreen offers natural and organic latex mattresses that combine eco-friendly materials with ergonomic design. Handmade in Canada, Evergreen beds use certified organic latex, cotton, and wool to deliver safe, comfortable, and supportive sleep for health-conscious 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.

Medium Mattresses Foam Core/No Coils Mattresses Compatible with Adjustable Bed Base | Flex‑Friendly Foam, Latex & Hybrid Temperature‑Regulating Mattresses | Year‑Round Comfort & Balance Evergreen
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  • EVERGREEN™ 12" Medium-Firm Organic Latex Foam Mattress EVERGREEN™ 12" Medium-Firm Organic Latex Foam Mattress brand icon
    • Open Cell Bio Foam Core
    • 4" Organic Latex Comfort Layer
    • 1" Organic Latex Support Panel
    • Organic Cotton Quilt
    • 10 Year Warranty
    • Made In Toronto, Canada
    Single/Twin In stock for fast delivery $1,011
    Twin XL In stock for fast delivery $1,027
    Double/Full In stock for fast delivery $1,043
    Queen In stock for fast delivery $1,167
    Compare at $2,099
    King In stock for fast delivery $1,575
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  • EVERGREEN 100% Certified Organic 10" Medium Firm Latex Mattress EVERGREEN 100% Certified Organic 10" Medium 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 In stock for fast delivery $1,384
    Twin XL In stock for fast delivery $1,877
    Double/Full In stock for fast delivery $1,906
    Queen In stock for fast delivery $1,935
    Compare at $3,599
    King In stock for fast delivery $2,650
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  • EVERGREEN™ 12" Medium-Firm Organic Latex Foam Mattress - Single/Twin EVERGREEN™ 12" Medium-Firm Organic Latex Foam Mattress - Single/Twin brand icon
    • Open Cell Bio Foam Core
    • 4" Organic Latex Comfort Layer
    • 1" Organic Latex Support Panel
    • Organic Cotton Quilt
    • 10 Year Warranty
    • Made In Toronto, Canada
    Single/Twin In stock for fast delivery $1,011
    Compare at $1,799
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  • EVERGREEN™ 12" Medium-Firm Organic Latex Foam Mattress - Twin XL EVERGREEN™ 12" Medium-Firm Organic Latex Foam Mattress - Twin XL brand icon
    • Open Cell Bio Foam Core
    • 4" Organic Latex Comfort Layer
    • 1" Organic Latex Support Panel
    • Organic Cotton Quilt
    • 10 Year Warranty
    • Made In Toronto, Canada
    Twin XL In stock for fast delivery $1,027
    Compare at $1,899
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  • EVERGREEN™ 12" Medium-Firm Organic Latex Foam Mattress - Double/Full EVERGREEN™ 12" Medium-Firm Organic Latex Foam Mattress - Double/Full brand icon
    • Open Cell Bio Foam Core
    • 4" Organic Latex Comfort Layer
    • 1" Organic Latex Support Panel
    • Organic Cotton Quilt
    • 10 Year Warranty
    • Made In Toronto, Canada
    Double/Full In stock for fast delivery $1,043
    Compare at $1,999
    Online availability icon In-Stock Only 4 left!
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  • EVERGREEN™ 12" Medium-Firm Organic Latex Foam Mattress - Queen EVERGREEN™ 12" Medium-Firm Organic Latex Foam Mattress - Queen brand icon
    • Open Cell Bio Foam Core
    • 4" Organic Latex Comfort Layer
    • 1" Organic Latex Support Panel
    • Organic Cotton Quilt
    • 10 Year Warranty
    • Made In Toronto, Canada
    Queen In stock for fast delivery $1,167
    Compare at $2,099
    Online availability icon In-Stock Only 2 left!
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  • EVERGREEN 100% Certified Organic 10" Medium Firm Latex Mattress - Single/Twin EVERGREEN 100% Certified Organic 10" Medium Firm Latex Mattress - Single/Twin 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 In stock for fast delivery $1,384
    Compare at $2,599
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  • EVERGREEN™ 12" Medium-Firm Organic Latex Foam Mattress - King EVERGREEN™ 12" Medium-Firm Organic Latex Foam Mattress - King brand icon
    • Open Cell Bio Foam Core
    • 4" Organic Latex Comfort Layer
    • 1" Organic Latex Support Panel
    • Organic Cotton Quilt
    • 10 Year Warranty
    • Made In Toronto, Canada
    King In stock for fast delivery $1,575
    Compare at $2,799
    Online availability icon In-Stock Only 3 left!
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  • OPEN BAG - EVERGREEN 100% Certified Organic 10" Medium Firm Latex Mattress - Queen OPEN BAG - EVERGREEN 100% Certified Organic 10" Medium Firm Latex Mattress - Queen 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
    Queen In stock for fast delivery $1,800
    Compare at $3,599
    Online availability icon In-Stock Only 1 left!
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  • EVERGREEN 100% Certified Organic 10" Medium Firm Latex Mattress - Twin XL EVERGREEN 100% Certified Organic 10" Medium Firm Latex Mattress - Twin XL 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
    Twin XL In stock for fast delivery $1,877
    Compare at $3,599
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  • EVERGREEN 100% Certified Organic 10" Medium Firm Latex Mattress - Double/Full EVERGREEN 100% Certified Organic 10" Medium Firm Latex Mattress - Double/Full 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
    Double/Full In stock for fast delivery $1,906
    Compare at $3,599
    Online availability icon In-Stock Only 2 left!
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  • EVERGREEN 100% Certified Organic 10" Medium Firm Latex Mattress - Queen EVERGREEN 100% Certified Organic 10" Medium Firm Latex Mattress - Queen 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
    Queen In stock for fast delivery $1,935
    Compare at $3,599
    Online availability icon In-Stock Only 2 left!
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