Medium Pocket Coil Side Sleeper Adjustable Base Compatible Black 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.
Pocket coil mattresses use individually wrapped coils that move independently, delivering targeted support and far less motion transfer than traditional innersprings. They contour better and isolate movement while keeping a coil bed's breathability — a great fit for couples. Compare every pocket coil option below.
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 Pocket Coil Side Sleeper Adjustable Base Compatible Black All Mattresses
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  • NM 10" Medium Firm Euro Top Mattress NM 10" Medium Firm Euro Top Mattress brand icon
    • 800 Hi-Loft Pocket Coil
    • Cool Gel infused memory foam
    • Luxurious Knit Fabric
    • 10 Year Warranty
    • Made In Toronto, Canada
    Single/Twin $318
    Double/Full $325
    Queen $347
    Compare at $699
    King SOLD OUT
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  • NM 12" Medium Firm Euro Top Mattress
    BEST IN CLASS BEST SELLING
    NM 12" Medium Firm Euro Top Mattress NM 12" Medium Firm Euro Top Mattress brand icon
    • 1000 Hi-Loft Pocket Coil with Foam Encased Perimeter
    • Cool Gel infused memory foam
    • Bio-Foam natural foam content reduces your carbon footprint
    • 10 Year Warranty
    • Made In Toronto, Canada
    Single/Twin $411
    Twin XL $455
    Double/Full $462
    Queen $498
    Compare at $999
    King $698
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  • SEALY® Posturepedic Luxury® 14.5" Medium Firm Hybrid Eurotop Mattress SEALY® Posturepedic Luxury® 14.5" Medium Firm Hybrid Eurotop Mattress brand icon
    • SealyMAX™ Core System featuring SealyResponse™ PRO & SolidSupport™ Pocket Coils
    • GelSense™ MAX Memory Foam
    • SealySupport™ Gel HD Foam
    • SupremeLoft™ Quilt featuring Silk & Wool
    • SealyCool™ Fabric
    • SolidEdge™ PRO Coil Edge
    Twin XL $995
    Double/Full SOLD OUT
    Queen SOLD OUT
    Compare at $2,299
    King SOLD OUT
    Online availability icon In-Stock Only 4 left!
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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 $1,312
    Double/Full SOLD OUT
    Queen SOLD OUT
    Compare at $2,899
    King SOLD OUT
    Online availability icon In-Stock Only 2 left!
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  • BEAUTYREST® Centennial® 13.5" Tight Top Medium-Firm Mattress BEAUTYREST® Centennial® 13.5" Tight Top Medium-Firm Mattress brand icon
    • 1850 T3 Triple Stranded Pocketed Coil® and Micro Coil Technology
    • SurfaceTouch™ Gel Memory Foam
    • Self-Response™ Latex
    • Beautyrest® Gel Support Foam
    • Sleep Climate™ Surface enhanced with cooling yarn
    Single/Twin $2,069
    Twin XL $2,109
    Double/Full SOLD OUT
    Queen SOLD OUT
    Compare at $3,299
    King SOLD OUT
    Online availability icon In-Stock Only 8 left!
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  • BEAUTYREST® Centennial® 15.5" Pillow Top Medium-Firm Mattress BEAUTYREST® Centennial® 15.5" Pillow Top Medium-Firm Mattress brand icon
    • 1850 T3 Triple Stranded Pocketed Coil® and Micro Coil Technology
    • SurfaceTouch™ Gel Memory Foam
    • Self-Response™ Latex
    • Beautyrest® Gel Memory Foam
    • Beautyrest® Gel Support Foam
    • Sleep Climate™ Surface enhanced with cooling yarn
    Single/Twin $2,459
    Twin XL $2,499
    Double/Full SOLD OUT
    Queen SOLD OUT
    Compare at $3,899
    King SOLD OUT
    Online availability icon In-Stock Only 7 left!
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  • BEAUTYREST® Centennial® 14.5" Tight Top Medium-Firm Mattress BEAUTYREST® Centennial® 14.5" Tight Top Medium-Firm Mattress brand icon
    • 2850 T3 Triple Stranded Pocketed Coil® and Micro Coil Technology
    • SurfaceTouch™ Gel Memory Foam
    • Self-Response™ Latex
    • Micro Diamond™ Memory Foam
    • Beautyrest® Gel Comfort Foam
    • Sleep Climate™ Surface enhanced with cooling yarn
    Single/Twin $2,659
    Twin XL $2,699
    Double/Full $2,699
    Queen $2,749
    Compare at $4,199
    King SOLD OUT
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  • BEAUTYREST® Centennial® 16.5" Super Pillow Top Medium-Firm Mattress BEAUTYREST® Centennial® 16.5" Super Pillow Top Medium-Firm Mattress brand icon
    • 2850 T3 Triple Stranded Pocketed Coil® and Micro Coil Technology
    • SurfaceTouch™ Gel Memory Foam
    • Self-Response™ Latex
    • Micro Diamond™ Memory Foam
    • Beautyrest® Gel Memory Foam
    • Sleep Climate™ Surface enhanced with cooling yarn
    Single/Twin $2,699
    Twin XL $2,799
    Double/Full $2,899
    Queen $2,999
    Compare at $4,799
    King $3,340
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  • 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 $318
    Compare at $599
    Online availability icon In-Stock Only 6 left!
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  • 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 $325
    Compare at $699
    Online availability icon In-Stock
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery as soon as Tomorrow, Jun 5
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  • 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 $347
    Compare at $699
    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
  • NM 12" Medium Firm Euro Top Mattress - Single/Twin NM 12" Medium Firm Euro Top Mattress - Single/Twin brand icon
    • 1000 Hi-Loft Pocket Coil with Foam Encased Perimeter
    • Cool Gel infused memory foam
    • Bio-Foam natural foam content reduces your carbon footprint
    • 10 Year Warranty
    • Made In Toronto, Canada
    Single/Twin $411
    Compare at $799
    Online availability icon In-Stock Only 8 left!
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