SERTA® Modern Series™ 10" Extra-Firm Gel Foam Mattress - King
Serta Modern Series mattresses deliver cutting-edge comfort at a great price point, featuring gel-infused memory foams and a convenient mattress-in-a-box design – all proudly crafted in Canada for today’s lifestyle.
Serta Modern Series 10" Extra-firm Gel Foam Mattress - King - Elevate Your Sleep Experience Today!
Indulge in the ultimate relaxation with the Serta Modern Boost XF mattress, meticulously crafted for those who crave true comfort during their sleep. This King size treasure stands tall at a 10-inch profile, delivering extra-firm support that aligns beautifully with your body’s contours. Featuring state-of-the-art cooling technology, this mattress ensures you awaken revitalized and ready to embrace the day ahead from the moment you lay down.
Key Features
Exceptional Cooling: The Serta CoolWick Breathable Cover actively draws moisture away, providing a fresh and dry sleeping surface while keeping excess heat at bay throughout the night.
Luxury Comfort Layers: Experience unparalleled softness with dual layers of PureComfort Gel Foam, expertly designed to relieve pressure points and cradle your body, creating the perfect retreat for peaceful slumber.
Supportive Core: The robust PureComfort Foam Support Core guarantees superior support, ensuring every inch of your body gets the relief it deserves, night after night.
Crafted Quality: Proudly made in Canada, this mattress reflects a commitment to quality craftsmanship, ensuring durability and comfort you can rely on for years to come.
Benefits
Rejuvenating Rest: Dive into restorative sleep that invigorates your body and mind, preparing you to conquer whatever your day throws at you.
Targeted Pressure Relief: This expertly designed mattress minimizes pressure points, making each morning a gentle awakening, free from aches and discomfort.
Cool Comfort Technology: Enjoy a refreshing night’s sleep with Serta’s gel-infused foam technology, promoting optimal temperature regulation for a serene sleep environment.
Ideal For
Individuals looking for an extra-firm mattress to enhance their sleep posture and overall alignment.
Hot sleepers requiring a temperature-regulated environment for unmatched comfort throughout the night.
Couples who appreciate motion isolation to ensure undisturbed sleep from each other’s movements.
Details
Dimensions: 76″ x 80″ (inches) | 193cm x 203cm (centimeters)
Profile Height: 10 Inches
Firmness: Extra Firm
Warranty: Full Manufacturer’s Warranty
Guarantees:
Free next day delivery for your convenience
100 night sleep trial to ensure your satisfaction
Price match guarantee to keep your investment secure
In summary, the Serta Modern Boost XF mattress stands as your passport to fantastic sleep, harmonizing premium comfort with the support you trust. With thoughtful features enhancing breathability and cooling properties, every night transforms into a journey of luxurious serenity. Treat yourself to cloud-like softness and wake up renewed—experience the dream of better sleep with this remarkable mattress!
Serta is proud to be the manufacturer of the World’s Best Mattress™. Their commitment to quality has made them a leader in the industry, and they look forward to helping you find the right mattress so you can get a better night’s sleep for years to come.
Visit our Mississauga mattress outlet or Toronto mattress outlet to view Serta mattresses on sale and special deals and outlet pricing offers! All mattresses are brand new, sealed, with full manufacturer’s warranty serviced by National Mattress Outlet.
For more than 80 years, Serta has been making consistent investments into the highest quality and most innovative features to ensure that every mattress set we manufacture delivers superior comfort and support. Throughout its history, Serta has been an industry leader, offering many product “firsts” – including the world’s first-ever “tuftless” mattress. Today, Serta is proud to offer a variety of exclusive features including our patented Advanced Comfort Quilt® and Continuous Support® Innerspring.
We offer FREE DELIVERY to all major cities in Ontario and the surrounding area on orders over $199. A delivery surcharge of $45 applies to orders under $199.
Select your delivery date at checkout (if applicable) and add any special instructions in the order comments (e.g., “Ring Buzzer #1234”). If a date isn’t shown or selected at checkout, you’ll receive an email with scheduling options. Day‑of, you’ll get a text and email with a 2‑hour window and live tracking. Estimates apply to in‑stock items; rural or weather‑affected addresses may require extra time.
Barrie • Innisfil • Orillia • Midland • Collingwood • Bradford • Washago and more
1–3 days on average
Northern & Eastern Ontario
Cobourg • Peterborough • Kawartha Lakes • Minden • Haliburton • Port Perry • Bowmanville and more
1–3 days on average
Western Ontario
London • Stratford • Woodstock • Brantford • Grand Bend • Port Elgin • Tobermory and more
Need delivery outside the GTA?
We also ship to all provinces in Canada at competitive rates (territories excluded). Enter your postal code at the top of the website to see what’s available.
Ready to Sleep Better?
Shop online 24/7 or visit any National Mattress location across Ontario. Spend $199+ and relax—your new mattress will arrive quickly and free of charge locally, or ship fast across Canada.
Where does National Mattress offer free local delivery?
We offer FREE local delivery to major cities across Ontario on orders of $199+. Check the region cards above for specific cities.
Do you ship mattresses across Canada?
Yes. We ship select roll‑packed mattresses to all provinces (YT, NT, NU excluded). Transit times range from 1–2 days in ON & QC to 3–4 days in BC and NL after shipping.
Is next‑day delivery available in the GTA?
Yes. FREE next‑day local delivery is available in many GTA and surrounding areas, subject to inventory and cutoff times.
What if my Ontario local order total is under $199?
A $45 delivery surcharge applies to orders under $199.
How do I schedule or change my delivery date?
Select a date at checkout. If a chosen date isn’t available, you’ll receive an email proposing an alternative—simply reply to reschedule. In‑store purchases can be scheduled at the time of sale.
Will I get tracking updates?
Yes. Local deliveries include day‑of text/e‑mail with a 2‑hour window plus live GPS tracking. Canada‑wide shipments include a courier tracking number once picked up.
Do you deliver to Yukon, Nunavut, or the Northwest Territories?
What materials give this mattress its extra-firm feel?
This mattress uses a combination of extra-firm comfort foams and a robust support core such as high-density base foam or firm, high-gauge pocketed coils to create its extra-firm feel.
The design limits sink-in and keeps the surface very flat; see the...
Does this edge support mattress come with a trial or comfort guarantee?
Yes, we offer a 100 night sleep trial with any mattress purchase.
Is this mattress suitable if I have lower back issues?
This extra-firm mattress is designed to provide very high support and minimize hip and torso sink, which can help some people with lower back problems.
If you have diagnosed back issues or are unsure whether extra-firm is appropriate for you, talk to...
Does this mattress come with a warranty?
Yes. This mattress includes a warranty from the manufacturer. Check the product details or warranty tab on the page to see the length of coverage, what is included, and any conditions that apply.
What types of foam are used in this mattress?
This foam mattress uses a combination of support and comfort foams such as high-density base foam, transitional foam, and softer top foams for pressure relief.
See the construction and materials section on the product page for detailed information on...
How does this extra-firm model compare in feel to your firm and medium-firm models?
This extra-firm mattress is noticeably harder and flatter at the surface than our firm and medium-firm options.
If you want maximum support with minimal cushioning, choose this extra-firm model; if you prefer some contouring and softer pressure relief...
Is this king mattress good for side sleepers?
Side sleepers usually prefer a mattress that relieves pressure at the shoulders and hips while keeping the spine aligned.
Look for king mattresses described as medium or medium-soft with comfort layers that contour to the body and cushion key pressure...
Is this mattress supportive enough for a heavier back sleeper?
This mattress uses a robust support core designed to handle higher body weights while maintaining alignment for back sleepers. Its firmness and materials help prevent the hips and lower back from sinking too deeply, which is especially important for ...
Is this mattress compatible with thin or low-profile pillows for stomach sleepers?
Yes. This mattress is designed to pair well with low-profile pillows that help keep the neck in a more neutral position for stomach sleepers. The supportive surface helps maintain hip and lower back alignment while a thin pillow prevents excessive neck...
Will this Serta mattress hold its shape over time?
This Serta mattress is constructed with support and comfort materials chosen to help maintain its shape and feel under normal use.
Review the product details for information on the support system, foam densities, and care recommendations to get the ...
Will this foam mattress hold its shape and support over time?
This foam mattress is built with support and comfort foams selected to maintain their feel under normal use.
Check the durability details, foam densities (if provided), and care recommendations in the product description to understand how to get the...
What types and densities of memory foam are used in this mattress?
This memory foam mattress uses specific memory foam and support foams such as higher-density support foam and softer memory foam comfort layers to balance pressure relief and durability.
Check the construction and materials section for details on the...
Is this 10 inch mattress suitable for everyday adult use or only for guests?
This 10 inch mattress is designed for regular nightly use by adults, but it can also serve well in guest rooms. Check the product specifications, firmness, and user reviews to make sure it aligns with your sleep position, body type, and how often it ...
Is this 10 inch mattress all foam, hybrid, or innerspring?
This mattress uses the construction described on the product page, for example all foam, hybrid, or innerspring. Review the materials section to see details about the support core, comfort layers, and cover so you know what type of feel and performance...
Will this 10 inch mattress feel different from my current thinner mattress?
Yes. A 10 inch mattress typically feels more substantial than a thin mattress, with more noticeable comfort layers and often better pressure relief. If you are upgrading from a 6 or 8 inch model, you may experience increased cushioning and support, especially...
Is this mattress good for side-sleeping couples?
This mattress is designed to combine pressure relief for side sleepers with strong motion isolation, making it a good option for couples. Its construction helps cushion shoulders and hips while limiting how much one partner feels the other's movements...
Do I need a mattress protector for warranty?
Some warranties strongly recommend or require using a mattress protector to prevent stains and damage. Check the care and warranty instructions on this product page to see if a protector is required or simply advised for maintaining coverage.
Does this memory foam mattress have cooling features?
This memory foam mattress incorporates materials and design elements such as gel-infused or open-cell memory foam and breathable cover fabrics intended to help manage heat.
Check the product description for specific cooling technologies included in ...
Does this king mattress have strong edge support?
Many king mattresses feature reinforced edges or sturdier coils around the perimeter to prevent roll-off and make it easier to sit on the side of the bed.
Check the product description for mentions of edge support, perimeter reinforcement, or foam encasement...
Is this mattress comfortable for long periods of back sleeping?
This mattress is designed to balance support and comfort for back sleepers. Its comfort layers cushion contact points while the support core maintains alignment, making it suitable for people who spend much or most of the night on their backs.
Is this mattress suitable for an adjustable base?
Many extra-firm mattresses especially foam and certain hybrid designs are compatible with adjustable bases and are built to bend and flex as the base moves.
Check the product description for specific notes on adjustable base compatibility and follow...
Is this Serta mattress compatible with an adjustable base?
Several Serta mattresses are designed to be compatible with adjustable bases and can bend and flex with the base's movement.
Look for adjustable-base compatibility in the product description and make sure any base you choose meets Serta's support requirements...
Is this mattress a true memory foam mattress or just regular foam?
This mattress is a true memory foam design, using viscoelastic foam in the comfort system that responds slowly to pressure and contours closely to your body.
You can confirm this in the construction and materials section, which specifies memory foam...
Is this king mattress suitable for everyday use in a primary bedroom?
This king mattress is designed for regular nightly use, with a balance of comfort and support suitable for couples or single sleepers who want extra space.
Check the firmness, materials, and customer reviews on the product page to make sure it matches...
Is this 10 inch mattress supportive enough for a heavier sleeper?
This 10 inch mattress is built with a support core and comfort layers designed for regular adult use. Heavier sleepers should review the firmness rating, material densities, and weight guidelines on the product page to ensure it is recommended for their...
Will standard sheets fit on a 10 inch mattress?
Yes. Most standard fitted sheets are designed to fit a range of mattress depths and will accommodate a 10 inch mattress without issue. If you want a snugger fit, look for sheets with a pocket depth that matches low to medium profile mattresses and elastic...
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