Medium Mattresses Compatible with Adjustable Bed Base | Flex‑Friendly Foam, Latex & Hybrid Serta Mattresses

Medium mattresses balance cushioning and support — soft enough to relieve pressure, firm enough to keep your spine aligned. This medium-firm feel is the most universally comfortable choice, suiting combination sleepers, couples with different preferences, and most back and side sleepers. Compare every medium option below by brand and profile.
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.

Serta is a globally recognized mattress brand celebrated for its comfort-first designs and sleep innovations. With over 90 years of experience, Serta continues to deliver quality mattresses that Canadians can trust.

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 Compatible with Adjustable Bed Base | Flex‑Friendly Foam, Latex & Hybrid Serta
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  • SEALY® Posturepedic Luxury® 13.5" Medium Firm Hybrid Mattress SEALY® Posturepedic Luxury® 13.5" Medium 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 $1,404
    Double/Full $1,435
    Queen $1,515
    Compare at $3,599
    King $1,812
    Online availability icon In-Stock Only 2 left!
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    Free delivery availability icon Free delivery as soon as Tomorrow, Jun 11
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  • STEARNS & FOSTER® Estate® 15" Medium Firm Pillow Top Mattress STEARNS & FOSTER® Estate® 15" Medium Firm Pillow Top Mattress brand icon
    • Indulge Quilt With Silk & Wool Fibres
    • PrecisionMatch™ Memory Foam
    • PrimaSense™ Gel Infused Comfort Layers
    • Intellicoil® Innerspring (Pocket Coil)
    • Handmade By Certified Master Craftsman
    Twin XL In stock for fast delivery $1,899
    Double/Full In stock for fast delivery $1,999
    Queen $2,099
    Compare at $3,099
    King $2,699
    Online availability icon In-Stock Only 9 left!
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  • STEARNS & FOSTER® Lux Estate® 16" Medium Firm Euro Top Mattress STEARNS & FOSTER® Lux Estate® 16" Medium Firm Euro Top Mattress brand icon
    • Indulge Quilt With Silk & Wool Fibres
    • Cooling Fibres With Tencel™
    • PrecisionMatch™ Memory Foam
    • Supportive Latex Comfort Layer
    • PrimaSense™ Gel Infused Comfort Layers
    • Intellicoil® Innerspring (Pocket Coil) With Intellicoil® Micro HD
    • Handmade By Certified Master Craftsman
    Twin XL In stock for fast delivery $2,549
    Double/Full $2,649
    Queen $2,749
    Compare at $4,399
    King $3,349
    Online availability icon In-Stock Only 5 left!
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  • NM 8" Medium Firm Memory Foam Mattress - Single/Twin
    BEST IN CLASS BEST SELLING TOP RATED
    NM 8" Medium Firm Memory Foam Mattress - Single/Twin NM 8" Medium Firm Memory Foam Mattress - Single/Twin brand icon
    • High Density Foam Core
    • Cool Gel Memory Foam
    • Hypoallergenic Bamboo Cover
    • 10 Year Warranty
    • Made In Toronto, Canada
    Single/Twin In stock for fast delivery $289
    Compare at $599
    Online availability icon In-Stock Only 2 left!
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  • NM 10" Medium Firm Euro Top Mattress - Single/Twin
    BEST IN CLASS BEST SELLING TOP RATED
    NM 10" Medium Firm Euro Top Mattress - Single/Twin NM 10" Medium Firm Euro Top Mattress - Single/Twin brand icon
    • 800 Hi-Loft Pocket Coil
    • Cool Gel infused memory foam
    • Luxurious Knit Fabric
    • 10 Year Warranty
    • Made In Toronto, Canada
    Single/Twin In stock for fast delivery $318
    Compare at $599
    Online availability icon In-Stock Only 6 left!
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    Free delivery availability icon Free delivery as soon as Tomorrow, Jun 11
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  • NM 10" Medium Firm Euro Top Mattress - Double/Full
    BEST IN CLASS BEST SELLING TOP RATED
    NM 10" Medium Firm Euro Top Mattress - Double/Full NM 10" Medium Firm Euro Top Mattress - Double/Full brand icon
    • 800 Hi-Loft Pocket Coil
    • Cool Gel infused memory foam
    • Luxurious Knit Fabric
    • 10 Year Warranty
    • Made In Toronto, Canada
    Double/Full In stock for fast delivery $325
    Compare at $699
    Online availability icon In-Stock
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    Free delivery availability icon Free delivery as soon as Tomorrow, Jun 11
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  • NM 10" Medium Firm Euro Top Mattress - Queen
    BEST IN CLASS BEST SELLING TOP RATED
    NM 10" Medium Firm Euro Top Mattress - Queen NM 10" Medium Firm Euro Top Mattress - Queen brand icon
    • 800 Hi-Loft Pocket Coil
    • Cool Gel infused memory foam
    • Luxurious Knit Fabric
    • 10 Year Warranty
    • Made In Toronto, Canada
    Queen In stock for fast delivery $347
    Compare at $699
    Online availability icon In-Stock
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    Free delivery availability icon Free delivery as soon as Tomorrow, Jun 11
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  • NM 8" Medium Firm Memory Foam Mattress - Double/Full
    BEST IN CLASS BEST SELLING TOP RATED
    NM 8" Medium Firm Memory Foam Mattress - Double/Full NM 8" Medium Firm Memory Foam Mattress - Double/Full brand icon
    • High Density Foam Core
    • Cool Gel Memory Foam
    • Hypoallergenic Bamboo Cover
    • 10 Year Warranty
    • Made In Toronto, Canada
    Double/Full In stock for fast delivery $399
    Compare at $799
    Online availability icon In-Stock Only 4 left!
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  • NM 8" Medium Firm Memory Foam Mattress - Twin XL
    BEST IN CLASS BEST SELLING TOP RATED
    NM 8" Medium Firm Memory Foam Mattress - Twin XL NM 8" Medium Firm Memory Foam Mattress - Twin XL brand icon
    • High Density Foam Core
    • Cool Gel Memory Foam
    • Hypoallergenic Bamboo Cover
    • 10 Year Warranty
    • Made In Toronto, Canada
    Twin XL In stock for fast delivery $399
    Compare at $799
    Online availability icon In-Stock Only 6 left!
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  • SEALY® Essentials 11" Medium Firm Tight Top Mattress - Single/Twin SEALY® Essentials 11" Medium Firm Tight Top Mattress - Single/Twin brand icon
    • CleanProtect™ Fabric
    • SealyLoft™ Quilt with Moisture Wicking Fibres
    • CertiPUR-US™ SealySupport™ HD Foam
    • Posture Touch® Pocket Coils
    • EssentialEdge™ Coil Support
    Single/Twin $409
    Compare at $999
    Online availability icon Backorder Available
    In-Store availability icon On Display:
    Estimated delivery icon Estimated free delivery on Tuesday, Jun 30
  • SEALY® Essentials 11" Medium Firm Tight Top Mattress - Twin XL SEALY® Essentials 11" Medium Firm Tight Top Mattress - Twin XL brand icon
    • CleanProtect™ Fabric
    • SealyLoft™ Quilt with Moisture Wicking Fibres
    • CertiPUR-US™ SealySupport™ HD Foam
    • Posture Touch® Pocket Coils
    • EssentialEdge™ Coil Support
    Twin XL $423
    Compare at $1,099
    Online availability icon Backorder Available
    In-Store availability icon On Display:
    Estimated delivery icon Estimated free delivery on Tuesday, Jun 30
  • NM 8" Medium Firm Memory Foam Mattress - Queen
    BEST IN CLASS BEST SELLING TOP RATED
    NM 8" Medium Firm Memory Foam Mattress - Queen NM 8" Medium Firm Memory Foam Mattress - Queen brand icon
    • High Density Foam Core
    • Cool Gel Memory Foam
    • Hypoallergenic Bamboo Cover
    • 10 Year Warranty
    • Made In Toronto, Canada
    Queen In stock for fast delivery $428
    Compare at $899
    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 11
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