Medium Memory Foam Side Sleeper Adjustable Base Compatible Yes Grey All 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.
Memory foam mattresses contour to your body, relieving pressure at the hips and shoulders while absorbing motion so you won't feel your partner move. They give a cradling, "hug" feel that suits side sleepers and couples. Browse every memory foam option below by brand, feel, and profile.
Side sleepers need a mattress that cushions the shoulders and hips while keeping the spine aligned — usually a plush to medium feel with strong pressure relief and contouring. The options below help side sleepers avoid shoulder and hip pain. Compare them by brand, feel, 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.

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 Memory Foam Side Sleeper Adjustable Base Compatible Yes Grey All Mattresses
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  • NM 12″ Medium Firm Memory Foam Mattress NM 12″ Medium Firm Memory Foam Mattress brand icon
    • Optimal High Resilient Bio-Foam Core
    • Gel Infused Visco Memory Foam
    • Cotton Channel Quilted Cover
    • 10 Year Warranty
    • Made In Toronto, Canada
    Single/Twin In stock for fast delivery $571
    Twin XL In stock for fast delivery $629
    Double/Full In stock for fast delivery $639
    Queen $694
    Compare at $1,299
    King In stock for fast delivery $967
    Online availability icon In-Stock
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery as soon as Tomorrow, Jun 6
    Pickup available icon Only Pickup available to
  • 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 $1,312
    Double/Full $1,340
    Queen $1,415
    Compare at $3,599
    King $1,693
    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 6
    Pickup available icon Only Pickup available to
  • TEMPUR-PEDIC® Tempur-ProAlign® 2.0 Teal 12" Medium Firm Memory Foam Mattress TEMPUR-PEDIC® Tempur-ProAlign® 2.0 Teal 12" Medium Firm Memory Foam Mattress brand icon
    • Cool-To-The-Touch Removeable Cover
    • High-Stretch Performance Panel
    • TEMPUR-APR+™ Material
    • TEMPUR® Material
    • TEMPUR® Support Layer
    Single/Twin $2,499
    Twin XL In stock for fast delivery $2,599
    Double/Full In stock for fast delivery $2,899
    Queen In stock for fast delivery $2,999
    Compare at $5,099
    King $3,699
    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 6
    Pickup available icon Only Pickup available to
  • NM 12″ Medium Firm Memory Foam Mattress - Single/Twin NM 12″ Medium Firm Memory Foam Mattress - Single/Twin brand icon
    • Optimal High Resilient Bio-Foam Core
    • Gel Infused Visco Memory Foam
    • Cotton Channel Quilted Cover
    • 10 Year Warranty
    • Made In Toronto, Canada
    Single/Twin In stock for fast delivery $571
    Compare at $1,099
    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 6
    Pickup available icon Only Pickup available to
  • NM 12″ Medium Firm Memory Foam Mattress - Twin XL NM 12″ Medium Firm Memory Foam Mattress - Twin XL brand icon
    • Optimal High Resilient Bio-Foam Core
    • Gel Infused Visco Memory Foam
    • Cotton Channel Quilted Cover
    • 10 Year Warranty
    • Made In Toronto, Canada
    Twin XL In stock for fast delivery $629
    Compare at $1,199
    Online availability icon In-Stock
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery as soon as Tomorrow, Jun 6
    Pickup available icon Only Pickup available to
  • NM 12″ Medium Firm Memory Foam Mattress - Double/Full NM 12″ Medium Firm Memory Foam Mattress - Double/Full brand icon
    • Optimal High Resilient Bio-Foam Core
    • Gel Infused Visco Memory Foam
    • Cotton Channel Quilted Cover
    • 10 Year Warranty
    • Made In Toronto, Canada
    Double/Full In stock for fast delivery $639
    Compare at $1,199
    Online availability icon In-Stock Only 4 left!
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery as soon as Tomorrow, Jun 6
    Pickup available icon Only Pickup available to
  • OPEN BAG - NM 12″ Medium Firm Memory Foam Mattress - Queen OPEN BAG - NM 12″ Medium Firm Memory Foam Mattress - Queen brand icon
    • Optimal High Resilient Bio-Foam Core
    • Gel Infused Visco Memory Foam
    • Cotton Channel Quilted Cover
    • 10 Year Warranty
    • Made In Toronto, Canada
    Queen In stock for fast delivery $645
    Compare at $1,299
    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 6
    Pickup available icon Only Pickup available to
  • NM 12″ Medium Firm Memory Foam Mattress - Queen
    BEST SELLING TOP RATED LIMITED STOCK
    NM 12″ Medium Firm Memory Foam Mattress - Queen NM 12″ Medium Firm Memory Foam Mattress - Queen brand icon
    • Optimal High Resilient Bio-Foam Core
    • Gel Infused Visco Memory Foam
    • Cotton Channel Quilted Cover
    • 10 Year Warranty
    • Made In Toronto, Canada
    Queen $694
    Compare at $1,299
    Online availability icon Backorder Available
    In-Store availability icon On Display:
    Estimated delivery icon Estimated free delivery on Tuesday, Jun 23
  • OPEN BAG - NM 12″ Medium Firm Memory Foam Mattress - King OPEN BAG - NM 12″ Medium Firm Memory Foam Mattress - King brand icon
    • Optimal High Resilient Bio-Foam Core
    • Gel Infused Visco Memory Foam
    • Cotton Channel Quilted Cover
    • 10 Year Warranty
    • Made In Toronto, Canada
    King In stock for fast delivery $899
    Compare at $1,799
    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 6
    Pickup available icon Only Pickup available to
  • NM 12″ Medium Firm Memory Foam Mattress - King NM 12″ Medium Firm Memory Foam Mattress - King brand icon
    • Optimal High Resilient Bio-Foam Core
    • Gel Infused Visco Memory Foam
    • Cotton Channel Quilted Cover
    • 10 Year Warranty
    • Made In Toronto, Canada
    King In stock for fast delivery $967
    Compare at $1,799
    Online availability icon In-Stock Only 6 left!
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery as soon as Tomorrow, Jun 6
    Pickup available icon Only Pickup available to
  • SEALY® Posturepedic Luxury® 13.5" Medium Firm Hybrid Mattress - Twin XL SEALY® Posturepedic Luxury® 13.5" Medium Firm Hybrid Mattress - Twin XL 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 $1,312
    Compare at $3,499
    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 6
    Pickup available icon Only Pickup available to
  • SEALY® Posturepedic Luxury® 13.5" Medium Firm Hybrid Mattress - Double/Full SEALY® Posturepedic Luxury® 13.5" Medium Firm Hybrid Mattress - Double/Full 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
    Double/Full $1,340
    Compare at $3,499
    Online availability icon Backorder Available
    In-Store availability icon On Display:
    Estimated delivery icon Estimated free delivery on Tuesday, Jun 23

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