Boxspring Kingsdown® Mattresses for Standard Bed Frames Kingsdown® Mattresses and Boxsprings
Kingsdown has been handcrafting premium sleep products since 1904, pairing over a century of craftsmanship with sleep-science-driven design. Explore Kingsdown's eco-conscious Dream Green collection in firm and plush comfort levels at National Mattress.
These mattresses are built for a standard bed frame, box spring or platform bed rather than an adjustable base — solid, no-flex support for a classic setup. Shopping by feel or build instead? Browse by comfort (plush, medium, firm) or by type (memory foam, hybrid, pocket coil, traditional). Using an adjustable base? See our adjustable-bed-compatible mattresses. Every order includes a 365-night sleep trial and free delivery across Canada.
Kingsdown is one of North America's oldest mattress makers, handcrafting sleep sets since 1904. With over a century of expertise and sleep-science-driven design, Kingsdown mattresses deliver tailored support and premium comfort built to last.
Shop the Kingsdown Dream Green collection at National Mattress — 8 mattress models in Single/Twin through King sizes, with profiles from 13.5" to 16.5". Choose firm or plush comfort in tight top and Euro top designs, and complete your sleep set with matching low-profile 5" or high-profile 9" boxsprings, including split Queen and King options. Every Kingsdown mattress ships free across Canada with a 365-night sleep trial, price match guarantee, and full manufacturer warranty coverage.
Upgrade your sleep at National Mattress
Discover a mattress that transforms your sleep into a truly rejuvenating experience. We offer a wide variety of options to suit every sleep style and preference, ensuring a better night's sleep.
Why Choose Us?
- Variety: From plush to firm, we have options for every body type and sleep style.
- Quality: Trusted brands and top-notch materials for long-lasting comfort.
- Sleep Trials & Warranties: Enjoy peace of mind with flexible trials and warranties.
- Expert Advice: Get personalized recommendations from our sleep specialists.
Mattress Selection Includes
- Memory Foam: Contours to your body for personalized comfort and pressure relief.
- Hybrid: Combines responsive springs with foam for balanced support and comfort.
- Innerspring: Provides firm support, bounce, and cooling airflow.
- Latex: Hypoallergenic, eco-friendly, and exceptionally comfortable.
- Adjustable Beds: Customize your sleep position for optimal comfort.
