Medium Side Sleeper New Arrival Cooling Technology 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.
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.
New-arrival mattresses are the latest models to join our lineup — the newest builds, materials, and collections, fresh in stock. Compare every new arrival below by brand, type, and feel.
Cooling-technology mattresses use gel-infused foams, phase-change covers, or cooling fibres that actively pull heat away from your body — ideal for hot sleepers who wake up overheated. Compare every cooling 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 Side Sleeper New Arrival Cooling Technology All Mattresses
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  • SPRINGWALL® HC Flippable 12" Medium Firm Euro Top Mattress SPRINGWALL® HC Flippable 12" Medium Firm Euro Top Mattress brand icon
    • 884 Full Perimeter Comfort Pockets® (Pocket Coils)
    • Bio Foam with Gel
    • Cool Touch Stretch Knit Sleep Surface
    • Flippable Bio Comfort Quilted Stretch knit surface
    • Made In Canada
    Single/Twin $403
    Twin XL $546
    Double/Full $554
    RV Short Queen $606
    Queen $657
    Compare at $1,399
    King $857
    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
  • 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!
    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
  • 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!
    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
  • 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
    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
  • SPRINGWALL® HC Flippable 12" Medium Firm Euro Top Mattress - Single/Twin SPRINGWALL® HC Flippable 12" Medium Firm Euro Top Mattress - Single/Twin brand icon
    • 884 Full Perimeter Comfort Pockets® (Pocket Coils)
    • Bio Foam with Gel
    • Cool Touch Stretch Knit Sleep Surface
    • Flippable Bio Comfort Quilted Stretch knit surface
    • Made In Canada
    Single/Twin $403
    Compare at $899
    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
  • SPRINGWALL® HC Flippable 12" Medium Firm Euro Top Mattress - Twin XL SPRINGWALL® HC Flippable 12" Medium Firm Euro Top Mattress - Twin XL brand icon
    • 884 Full Perimeter Comfort Pockets® (Pocket Coils)
    • Bio Foam with Gel
    • Cool Touch Stretch Knit Sleep Surface
    • Flippable Bio Comfort Quilted Stretch knit surface
    • Made In Canada
    Twin XL $546
    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
  • SPRINGWALL® HC Flippable 12" Medium Firm Euro Top Mattress - Double/Full SPRINGWALL® HC Flippable 12" Medium Firm Euro Top Mattress - Double/Full brand icon
    • 884 Full Perimeter Comfort Pockets® (Pocket Coils)
    • Bio Foam with Gel
    • Cool Touch Stretch Knit Sleep Surface
    • Flippable Bio Comfort Quilted Stretch knit surface
    • Made In Canada
    Double/Full $554
    Compare at $1,199
    Online availability icon In-Stock Only 3 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
  • SPRINGWALL® HC Flippable 12" Medium Firm Euro Top Mattress - Queen RV (Short Queen) SPRINGWALL® HC Flippable 12" Medium Firm Euro Top Mattress - Queen RV (Short Queen) brand icon
    • 884 Full Perimeter Comfort Pockets® (Pocket Coils)
    • Bio Foam with Gel
    • Cool Touch Stretch Knit Sleep Surface
    • Flippable Bio Comfort Quilted Stretch knit surface
    • Made In Canada
    RV Short Queen $606
    Compare at $1,399
    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
  • SPRINGWALL® HC Flippable 12" Medium Firm Euro Top Mattress - Queen SPRINGWALL® HC Flippable 12" Medium Firm Euro Top Mattress - Queen brand icon
    • 884 Full Perimeter Comfort Pockets® (Pocket Coils)
    • Bio Foam with Gel
    • Cool Touch Stretch Knit Sleep Surface
    • Flippable Bio Comfort Quilted Stretch knit surface
    • Made In Canada
    Queen $657
    Compare at $1,399
    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
  • SPRINGWALL® HC Flippable 12" Medium Firm Euro Top Mattress - King SPRINGWALL® HC Flippable 12" Medium Firm Euro Top Mattress - King brand icon
    • 884 Full Perimeter Comfort Pockets® (Pocket Coils)
    • Bio Foam with Gel
    • Cool Touch Stretch Knit Sleep Surface
    • Flippable Bio Comfort Quilted Stretch knit surface
    • Made In Canada
    King $857
    Compare at $1,799
    Online availability icon In-Stock Only 3 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
  • BEAUTYREST® Centennial® 13.5" Tight Top Medium-Firm Mattress - Twin XL BEAUTYREST® Centennial® 13.5" Tight Top Medium-Firm Mattress - Twin XL 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
    Twin XL $2,109
    Compare at $3,199
    Online availability icon In-Stock Only 7 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
  • BEAUTYREST® Centennial® 15.5" Pillow Top Medium-Firm Mattress - Twin XL BEAUTYREST® Centennial® 15.5" Pillow Top Medium-Firm Mattress - Twin XL 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
    Twin XL $2,499
    Compare at $3,799
    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

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