Is $479.99 a good price for this mattress?

It is the only new price we track as of November 7, 2026, at Mattress Firm, so there is no recent range to compare it with. Check the price against other 10-inch gel memory foam mattresses in the same size before buying.

What sizes does it come in?

Listings show Full and King. Confirm the size you want is in stock, since availability can differ by size.

Will it work on an adjustable bed?

Yes. The 10-inch all-foam build bends with adjustable bases, and the listing names adjustable beds as a use.

Does the gel foam really sleep cooler?

Gel-infused foam is designed to pull heat away better than plain memory foam, but it still sleeps warmer than a spring or hybrid mattress. Hot sleepers should weigh that.

Medium is the middle of the range: soft enough for side sleepers, firm enough for most back sleepers. Very heavy sleepers may want more support.

A foam mattress, usually compressed and rolled for shipping. A foundation or frame is sold separately.

Where is the Sleepy's Sealy cheapest?

At Mattress Firm, for $479.99, as of our latest check.

Sleepy's Sealy

Best price now

$479.99at Mattress FirmVerified

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Our take on the Sleepy's Sealy

This is a 10-inch gel memory foam mattress sold under the Sleepy's Sealy name, offered in Full and King and rated medium firmness. The gel-infused foam is meant to sleep cooler than standard memory foam, and the 10-inch profile works on most bed frames and adjustable bases. At $479.99 at Mattress Firm as of November 7, 2026, it is the only new price we track, so there is no recent range to compare it against.