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Boxspring Premium Tempur-pedic® Springwall® Serta® Queen Split Mattress and Bed Accessories

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
Tempur-Pedic mattresses use the original TEMPUR material — a one-of-a-kind foam that adapts to your body weight, shape, and temperature with virtually no motion transfer. Compare every option below by feel, size, and price.
Springwall is a proudly Canadian-made brand known for chiropractic-minded support and durable, value-driven construction. Compare every option below by feel, size, and price.
Serta mattresses balance comfort and support with cooling-gel foams and proven coil systems, from a name trusted in Canadian bedrooms for decades. Compare every option below by feel, size, and price.
A split queen box spring is a standard queen foundation built in two halves (each about 30″ × 80″) instead of one solid piece — so it slides up narrow staircases, around tight corners, and into condos and lofts where a one-piece queen box spring simply won't fit. Together the two halves support a standard queen mattress (60″ × 80″) exactly like a regular box spring. Shop split queen box springs and foundations matched to Sealy, Serta, Beautyrest, Simmons, Stearns & Foster and more — free delivery across Canada. • What it is: a queen box spring that splits into two ~30″ × 80″ halves • Why: fits up tight stairwells and into condos/lofts a one-piece can't • Supports a standard queen mattress (60″ × 80″) — same support as a solid box spring • Split box springs and foundations (plus compatible bed frames) • Brands: Sealy, Serta, Beautyrest, Simmons, Stearns & Foster, Springwall, Galaxy & NM • From $162 — free Canada-wide delivery

The bed you sleep on is a system, and the pieces around the mattress decide how well it performs. National Mattress carries pillows matched to how you sleep, mattress protectors that keep spills and body oils out of the comfort layers, bedding and sheets, mattress toppers, and the support that goes underneath: box springs, bed frames, adjustable bases, and bedroom essentials such as headboards and platform bedframes. Choosing well is mostly a matter of matching each piece to your sleep position, your mattress height, and the support your mattress needs to sit flat.

Boxspring Premium Tempur-pedic® Springwall® Serta® Queen Split Accessories
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  • SERTA® Boxspring - High Profile 9"
    FLASH SALE TOP RATED LIMITED STOCK
    Serta high-profile 9-inch boxspring foundation, white top deck with blue-grey heathered woven sides SERTA® Boxspring - High Profile 9" brand icon
    • 9" Pedestal Foundation
    • Quilted Border
    • Corner Guards
    • Dark Fabric
    • Works with all Serta Mattresses
    Queen Split $394
    Compare at $599
    Online availability icon Backorder Available
    In-Store availability icon On Display:
    Estimated delivery icon Estimated free delivery to M5H 2N1 on Tue, Sep 15
  • SERTA® Boxspring - Low Profile 5"
    FLASH SALE LIMITED STOCK
    Serta low-profile 5-inch boxspring foundation, white top deck with blue-grey heathered woven sides SERTA® Boxspring - Low Profile 5" brand icon
    • 5" Low Profile Foundation
    • Quilted Border
    • Corner Guards
    • Dark Fabric
    • Works with all Serta Mattresses
    Queen Split In stock for fast delivery $394
    Compare at $599
    Online availability icon In-Stock Only 2 left!
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery to M5H 2N1 as soon as Tomorrow, Aug 28
    Pickup available icon Only Pickup available to
    M5H 2N1

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How to Choose Bedding and Sleep Accessories

A bed is a system, and the pieces around the mattress decide how much of its comfort you actually feel. Start with the pillow, because it sets the angle of your neck and is the easiest thing to get wrong. Side sleepers need a high loft to fill the gap between ear and shoulder, back sleepers a medium loft that supports the curve of the neck without pushing the chin forward, and stomach sleepers the thinnest pillow they can tolerate. Fill then decides feel: memory foam, whether one moulded piece or granulated and loose, softens under body heat and holds the shape it takes; latex pushes back sooner and reads firmer and less enclosing at the same firmness label; feather can be punched into any shape and needs re-fluffing to keep it; and fiberfill sits lightest and washes most easily.

Below the sheets the job changes from comfort to protection and support. A mattress protector is a barrier against spills, sweat and skin oils, all of which reach the foam long before a stain shows. When you buy sheets, check the fitted pocket depth against your mattress height plus any topper, because a shallow pocket pops off the corners. Underneath, a mattress only performs on even, continuous support: a sound box spring, a bed frame with closely spaced slats, or an adjustable base if you want to raise the head and legs. Bedroom essentials such as headboards and platform bedframes finish the room.

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Pillow Loft by Position

Loft, not softness, is the real decision. Match pillow height to the gap your sleep position leaves, then pick a fill that holds that height.

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What a Protector Blocks

Liquid, perspiration and skin oils reach the comfort layers long before a stain shows, and foam does not wash. A thin knit faced laminate blocks all three and is close to unnoticeable; a quilted or padded protector softens the surface slightly.

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Sheet Pocket Depth

Measure the mattress from top seam to bottom seam, add any topper, then buy a fitted sheet with a deeper pocket than that total.

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Support Underneath

Foam and pocket coil beds need even support across the whole surface. Closely spaced slats, a sound box spring or an adjustable base all provide it.

Frequently Asked Questions About Bed and Mattress Accessories

Which accessories do I actually need with a new mattress?
Three things matter most: a pillow that suits your sleep position, a protector to keep spills and body oils out of the comfort layers, and support underneath that holds the mattress flat. Sheets with a deep enough pocket come next. A topper is usually unnecessary on a new mattress, since you already chose the feel. Frames and headboards are room decisions rather than sleep ones.
How do I pick a pillow for my sleep position?
Lie down the way you actually sleep and have someone look at your neck from the side. It should continue the straight line of your spine. If your chin tucks toward your chest the pillow is too tall, and if your head tips back it is too flat. Side sleepers usually need the most loft, back sleepers a medium loft, and stomach sleepers the least.
Do I really need a mattress protector?
If anything ever spills, if you sweat at night, or if a child or a pet is on the bed, yes. Body oils and perspiration soak into foam and quilting where you cannot wash them out, and liquid carries them deeper still. A protector takes that traffic instead and goes in the wash. A thin knit faced one is close to unnoticeable through the sheet, while a quilted or padded one softens the surface slightly.
Do I need a box spring, or is a platform bed enough?
Either can work; what matters is even, continuous support. A platform or slatted frame is enough when the slats sit close together, around three inches apart or less, so foam and pocket coil layers cannot bow between them. A box spring is the right answer when your frame is an open rail with no slats, or when you want extra height under a taller bed.
What size sheets do I need for a deep mattress?
Buy by pocket depth rather than by mattress name. Measure the side of the mattress from the top seam to the bottom seam, add the thickness of any topper, then choose a fitted sheet rated deeper than that number. Standard fitted sheets handle beds up to roughly twelve inches, and deep pocket sheets go further. Slightly too deep still fits; too shallow never will.
Can I add a topper to a brand new mattress?
You can, but ask why first. A topper changes surface feel, so it makes sense when a mattress you otherwise like sleeps firmer than you expected. It cannot add support, and it will mask the feel you deliberately chose. If a new mattress is badly wrong for you, the honest answer is usually a different mattress rather than a layer on top of this one.

Not Sure Which Accessories Your Bed Needs?

Our non-commissioned sleep experts can work through pillow loft, protectors, sheet depth and the support under your mattress with you.

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