Adjustable Bases King Premium Mattresses Sealy® Mattresses and Accessories

King mattresses measure 76" × 80" — the widest standard size, giving each partner the same personal space as a twin. They're the top choice for couples who want maximum room, families who co-sleep, and larger master bedrooms. Compare every king option below by brand, feel, and price.
Premium is the sweet spot between everyday value and luxury — name-brand mattresses with better materials, thicker comfort layers and more advanced support, without the flagship price tag. This is where you'll find recognizable comfort lines like Sealy Posturepedic Plus, Serta Perfect Sleeper and Perfect Day, Beautyrest Harmony, Chirofoam memory foam and Springwall Chiropractic — in euro-top, pillow-top, hybrid, memory foam and even organic latex builds, across every firmness from plush to extra firm. Most premium mattresses run from about $400 to $1,400. Every one includes a 365-night sleep trial, price-match guarantee and free delivery across Canada. • What "premium" means: name-brand comfort and upgraded materials — a step up from value, below the luxury flagships • Featured lines: Sealy Posturepedic Plus, Serta Perfect Sleeper & Perfect Day, Beautyrest Harmony, Chirofoam, Springwall Chiropractic • Builds: euro-top, pillow-top, hybrid, memory foam and organic latex • Every firmness from plush to extra firm • Typically about $400 to $1,400 • Looking higher or lower? See our luxury or great-value mattresses • Every order: 365-night sleep trial, price-match guarantee & free Canada-wide delivery

Sealy is a pioneering mattress brand known for its science-backed support and comfort. It was voted the #1 most trusted mattress brand in Canada, reflecting over a century of quality craftsmanship.

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.

Adjustable Bases King Premium Mattresses Sealy
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  • SEALY® Reflexion® Ultra Adjustable Base - 1 SEALY® Reflexion® Ultra Adjustable Base brand icon
    • Head & Foot Articulation
    • Wireless Backlit Remote
    • Personalized Zero-Gravity Preset
    • 2 Programmable Memory Positions
    • Full-Body Massage, Head & Foot (3 Intensities)
    • Massage Timer (10 / 20 / 30 Min)
    • Pillow Tilt
    • Lumbar Support
    • Dimmable Underbed LED (3 Levels)
    • Dual USB Charging (Type A & C)
    • Side Mattress Retainer Bars
    • 4-Height Adjustable Legs (3 / 6 / 9 / 12″)
    • Zero-Clearance (5″ Profile)
    • Foldable, Easy-Delivery Design
    • Headboard Brackets Included
    • 850 lb Lift Capacity
    King $2,399
    Compare at $4,299
    Online availability icon Backorder Available
    In-Store availability icon On Display:
    Estimated delivery icon Estimated free delivery to M5H 2N1 on Tue, Aug 18
  • SEALY® Reflexion® Plus Adjustable Base - 1 SEALY® Reflexion® Plus Adjustable Base brand icon
    • Head & Foot Articulation
    • Wireless Backlit Remote
    • Personalized Zero-Gravity Preset
    • 2 Programmable Memory Positions
    • Dimmable Underbed LED Lighting (3 Levels)
    • Dual USB Charging (Type A & C)
    • 4-Height Adjustable Legs (3 / 6 / 9 / 12 in)
    • Zero-Clearance Deck (3.7 in Profile)
    • Foldable, Easy-Delivery Design
    • Battery Backup Lowers Bed Flat
    • Child Lock
    • Headboard Brackets Sold Separately
    King $1,599
    Compare at $2,899
    Online availability icon Backorder Available
    In-Store availability icon On Display:
    Estimated delivery icon Estimated free delivery to M5H 2N1 on Tue, Aug 18

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