Plank Firm review

Plank's homepage says the brand owns its factory in Arizona, and the Plank Firm product page says the mattress is designed in Arizona. It is a single-purpose bed: a flippable all-foam mattress with an extra-firm side, rated a ten on the brand's firmness scale, and a firm side for people who find that too hard. The base is 6 inches of high-density foam under a 0.75-inch quilted top, and a GlacioTex cooling cover is an optional extra on the extra-firm side. Plank sells it in a wide range of sizes, including RV, Olympic Queen and short sizes. It was $699.30 on sale for the default size shown on the page when we checked, against a $999 regular price, which makes it the cheapest pick here. The 365-night trial and limited lifetime warranty match the bigger brands. Side sleepers should look elsewhere, since this is built for firm support, not cushioning.

Who it is for

stomach and back sleepers on a budget

Price

$699.30 on sale for the default size shown when checked; regular price $999.

Regular price $999.00 Sale price $699.30
Quoted from the vendor pricing page on November 11, 2026.

Key features

• Arizona factory owned by the brand; mattress designed in Arizona
• Flippable 10-inch all-foam design: extra firm on one side, firm on the other
• 6-inch high-density base foam
• Optional GlacioTex cooling cover
• Wide size range including RV, Olympic Queen and short sizes

Strengths and weaknesses

• Strength: Lowest price on this list at $699.30 on sale
• Strength: Two firmness levels in one flippable bed
• Strength: 365-night trial and limited lifetime warranty
• Weakness: Too firm for most side sleepers
• Weakness: All-foam, so no coil bounce or airflow
• Weakness: Product page says designed in Arizona rather than naming where each layer is made

Key facts

• Where it is made: Brand-owned Arizona factory
• Price: $699.30 on sale for default size, $999 regular
• Height: 10 inches
• Firmness: Flippable firm and extra firm

Where it ranks

Plank Firm is No. 7 in our Best American-Made Mattresses verdict.