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King Size Foam Mattresses

Experience the ultimate in comfort and support with our selection of king-size foam mattresses. Designed to provide a luxurious sleeping surface, these mattresses offer outstanding pressure relief and motion isolation for a restful night's sleep. Say goodbye to tossing and turning as you sink into the plush layers of foam that contour to your body's shape, ensuring you wake up feeling refreshed and rejuvenated. Upgrade your bedroom with a king-size foam mattress that combines innovative technology with superior comfort for a truly peaceful slumber every night.

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  1. Renanim - King 14" Plush Mattress in a Box, Breathable Cooling Gel Memory Foam for Cooler & Deeper Sleep - Gray

    SKU: J3R848WK28

    Product Description

    A plush gray memory foam mattress with cooling gel, breathable design, and hypoallergenic materials for deeper sleep.
    See all Mattresses
    Your price for this item is $695.00

  2. Vipbear - 12 " King Size Extra Firm Mattresses King Mattress, Cool Green Tea/Gel Memory Foam Mattress in Box, 80" x 75 " - White

    SKU: JJGT9C6Y9Z

    Product Description

    A white king mattress featuring cool green tea gel memory foam and a removable Tencel cover for comfort.
    See all Mattresses
    Your price for this item is $359.99

  3. Renanim - King 12" Medium Mattress in a Box, Breathable Cooling Gel Memory Foam for Cooler & Deeper Sleep - Gray

    SKU: J3R848WKCQ

    Product Description

    A gray medium-firm memory foam mattress with cooling gel and breathable, hypoallergenic design for deeper sleep.
    See all Mattresses
    Your price for this item is $525.41

  4. Dyonery - Extra Firm Mattress King Size 10 Inch, Premier High Density Foam Mattresses in Box, Supportive Bed-Mattress - White

    SKU: JJGT9CHSSP

    Product Description

    An extra-firm white foam mattress offering high-density support for spinal alignment and back comfort.
    See all Mattresses
    Your price for this item is $360.00

  5. Dyonery - Medium Firm Mattress King Size 10 Inch, Cooling Gel With High Density Foam Mattresses in Box - White

    SKU: JJGT9CHSKQ

    Product Description

    A white king-size mattress featuring medium firmness, cooling gel, and high-density foam for restful sleep.
    See all Mattresses
    Your price for this item is $315.00

  6. Dyonery - Medium Firm Mattress King Size 12 Inch, Cooling Gel With High Density Foam Mattresses in Box - White

    SKU: JJGT9CHSZR

    Product Description

    A white medium firm king mattress featuring cooling gel and high-density foam for comfortable sleep.
    See all Mattresses
    Your price for this item is $375.00

  7. Vipbear - 10" King Size Memory Foam Extra Firm Mattress, Luxury Cooling Gel Green Tea Bed Mattresses, Flip Firm Mattress - Black

    SKU: JJGT9CYKTJ

    Product Description

    An extra firm, flip-design memory foam mattress with cooling gel and green tea in black and green.
    See all Mattresses
    Your price for this item is $439.99
    Save $10
    The previous price was $449.99

  8. Dyonery - 4 inch high-density foam mattress, sturdy double-sided sleeping memory foam mattress, washable cover,King size - White

    SKU: JJGT9CSPJQ

    Product Description

    A white, double-sided king mattress topper with high-density bamboo charcoal foam and a washable cover.
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    Your price for this item is $145.00

  9. Casper - Wave Hybrid Mattress, California King - Gray

    SKU: JJ86Y2LVXL

    Product Description

    A gray California King hybrid mattress with breathable memory foam and cooling gel for optimal back support.
    See all Mattresses
    Your price for this item is $3,495.00
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In-store pricing may vary. Prices and offers are subject to change. © 2026 Best Buy. All rights reserved. BEST BUY, the BEST BUY logo, the tag design, and MY BEST BUY are trademarks of Best Buy and its affiliated companies.