Is the Sealy Spruce 5.5" good for everyday adult sleeping?

It suits lighter adults and occasional use. At 5.5 inches thick, heavier sleepers will likely feel the base through the foam.

Does it need a box spring?

No. Place it on a solid or slatted platform, a bunk base or a firm foundation. Avoid soft or flexible bases.

Sealy rates it medium. It has a memory foam top layer that softens under body heat.

Will it fit a standard Full frame?

Yes. It is a Full-size mattress and fits standard Full frames and bedding.

Is $424.99 a good price?

It is the best new price among the two stores listing it as of November 7, 2026. Thin foam mattresses in Full size often sell in the $300 to $500 range, so it sits mid-range.

Can it go on an adjustable base?

A 5.5-inch foam mattress can bend, but check the seller's guidance first. Many thin foam beds are not rated for adjustable bases.

Where is the Sealy Full Spruce 5.5" cheapest?

At Mattress Firm, for $424.99, as of our latest check.

Where can I buy the Sealy Full Spruce 5.5"?

2 stores we checked sell it, including Mattress Firm, The Home Depot.

Sealy Full Spruce 5.5"

Best price now

$424.99at Mattress FirmObserved at 1:24 PM

Compared across 2 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission. Price via Klarna.

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Our take on the Sealy Full Spruce 5.5"

The Sealy Spruce 5.5" is a low-profile memory foam mattress in a medium feel, sold in a Full size. Its 5.5-inch height makes it a budget pick for guest rooms, kids' rooms, bunk beds and platform frames rather than a primary adult bed. The best new price is $424.99 at Mattress Firm as of November 7, 2026, with two stores listing it new.