Ferlizer 4" Memory Foam Mattress Topper for RV

Our take on the Ferlizer 4" Memory Foam Mattress Topper for RV

The Ferlizer 4" Memory Foam Mattress Topper is a Twin-size, four-inch foam layer meant to soften an RV bunk or a firm mattress. At four inches it is thicker than most toppers, so it adds real cushioning but also changes bed height and sheet fit. The best new price is $78.99 at Wayfair as of November 6, 2026, and only one store lists it new, so there is no cheaper alternative to compare against.

Ferlizer 4" Memory Foam Mattress Topper for RV prices at every store

Ferlizer 4" Memory Foam Mattress Topper for RV price history

Lowest price we've seen: $78.99 on Nov 6 at Wayfair. Tracked across 1 store since Nov 6.

Questions and answers

Is a 4-inch topper too thick for an RV bunk?

It adds four inches to the mattress height, which can crowd a bunk with a low ceiling or a fitted sheet. Measure your bunk clearance and sheet depth before buying.

Will it make a firm RV mattress softer?

Yes. Four inches of memory foam is enough to soften a hard bunk noticeably, though very heavy sleepers may still feel the mattress underneath.

Does memory foam sleep hot?

Memory foam tends to trap body heat, and a thick topper insulates more than a thin one. A breathable mattress protector and cooler bedding help.

How long until it fully expands?

Compressed foam usually takes 24 to 72 hours to reach full thickness after unboxing. It may smell faintly of foam at first; air it out before use.

Is $78.99 a good price?

It is the only new price listed, $78.99 at Wayfair as of November 6, 2026, so there is no lower store price to compare against. Comparable Twin memory foam toppers often sell in the $60 to $120 range.

Does it come with a cover?

Check the listing for a removable cover before buying. Many toppers at this price ship as bare foam and need a separate protector.

Where is the Ferlizer 4" Memory Foam Mattress Topper for RV cheapest?

At Wayfair, for $78.99, as of our latest check.

Stores we've priced the Ferlizer 4" Memory Foam Mattress Topper for RV at

• Wayfair deals and prices