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Bunkie Board California King Under Mattress High-Density Polymer Cal King Bunkie Board Anti-Sag, Breathable, Moisture Resistant, Noise Minimizing

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$129.99 Why this price?
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Availability: In Stock.
Fulfilled by Amazon
Arrives Friday, Mar 20
Order within 1 hour and 17 minutes
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Size: California King


Color: Black


Features

  • Stable Support: The 7mm cal king bunkie board uses high-density polymer for long-lasting, stable mattress support that prevents sagging.
  • Non-slip Securing Strap: Equipped with black securing straps (sides & center) to firmly anchor the california king bunkie board to frame tubes, preventing movement and keeping the mattress stable.
  • Noise Reduction: The bunkie board california king size can effectively absorbs slat friction vibrations to eliminate squeaking for a quieter sleep.
  • Moisture Protection: The california king size bunkie board under mattress features a non-woven fabric surface to effectively block moisture, keeping the mattress fresh.
  • Compatibility: This low-profile california king bed bunkie board is made from ultra-lightweight folding material, fitting all standard cal king beds with slat spacing up to 4 inches.

Size: California King


Material: Plastic


Style: Modern


Special Feature: Foldable, Squeak Resistant


Color: Black


Item Weight: ‎20 pounds


Product Dimensions: ‎83.46 x 70.08 x 0.28 inches


Item model number: ‎LTBNK02-6CK


Assembled Height: ‎0.7 centimeters


Assembled Width: ‎178 centimeters


Assembled Length: ‎212 centimeters


Weight: ‎20 Pounds


Date First Available: December 10, 2025


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Mar 20

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Bunk Bed Game-Changer: Perfect for Kids Who Prefer Futons
Size: Twin Color: Black
This $79.99 polymer bunkie board is a specialized solution for families looking to transition away from traditional mattresses without sacrificing support. We specifically used this on our daughter's top bunk because she prefers a Japanese-style futon (shikibuton) over a standard mattress. Why It’s Perfect for Futons Traditional bunk bed slats are often spaced too far apart for a thin futon, which can cause the sleeper to feel the bars or let the futon sag. This board creates a solid, even surface that makes the futon feel like it's on a proper floor foundation while remaining safe for an upper bunk. The Highlights: Material Advantage: Unlike wood, the high-density polymer is moisture-resistant and breathable—critical for futon users to prevent mold or mildew buildup from body heat. Noise Minimizing: It’s incredibly quiet. There’s no creaking or wood-on-metal friction noise, which is a major plus for a child's top bunk. Low Profile: It adds virtually no height, ensuring the safety rails of the bunk bed remain at an effective level. Portability: It's lightweight and easy to slide into place, even in the tight quarters of a bunk bed setup. Value for Money: At roughly $80, it is a durable investment. While plywood is a cheaper DIY alternative, it lacks the breathability and finished edges that protect both the bed frame and the futon fabric. Final Verdict: For anyone using a Japanese futon or a very thin mattress on a slatted frame, this is a "must-have" to ensure comfort and longevity. - Pros: Anti-sag, moisture-resistant, completely silent. - Cons: Higher initial cost than basic wooden slats. ... show more
Reviewed in the United States on December 23, 2025 by Mama

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