Which is better for side sleepers?

The Spring Plush is listed for side and back sleepers and has a plush memory foam top for pressure relief. The Memory Foam Medium is a medium all-foam bed that also works for side sleepers but is not specifically listed for them.

Is the Spring Plush worth $1,150 more?

Only if you want pocket springs and a plush top. The Memory Foam Medium covers the basics for $449.99, so the extra money buys spring support and a plusher feel, not more sizes or delivery options.

Which is easier to set up?

The Memory Foam Medium. It arrives in a box and expands in up to 72 hours. The Spring Plush is a spring mattress and is not listed with boxed delivery.

The Memory Foam Medium has a cool-to-the-touch cover. The Spring Plush has a breathable cover and temperature-regulating features, and springs allow more airflow than solid foam.

Neither listing gives a warranty or expected lifespan. The Spring Plush claims Anti-Sag Micro-Lift construction to resist sagging, which is the only durability claim between the two.

Do both come in Full size?

The Spring Plush lists Full as its bed size. The Memory Foam Medium does not state available sizes, so confirm the size before ordering.

Sleepy's by Sealy Spring Plush Mattress vs Sleepy's by Sealy Memory Foam Medium Mattress

Buy the Sleepy's Memory Foam Medium if you want a simple, low-cost mattress that ships in a box. Buy the Spring Plush only if you specifically want a pocket-spring build and are ready to pay about $1,150 more. As of November 7, 2026, the Spring Plush is $1,599.99 at Mattress Firm and the Memory Foam Medium is $449.99 at Mattress Firm.

Today the Sleepy's by Sealy Memory Foam Medium Mattress costs $1,150.00 less at its best price.

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