4" Mattress Toppers

Memory Foam Mattress Toppers - 4 inch

Viscosoft offers multiple thickness options to customize your comfort. The 4-inch memory foam mattress topper transforms your mattress with superior support, stability, and added features for pain relief, cool sleep, and plush comfort—all with a washable cover for easy care.

Free shipping, easy returns & a 90-day guarantee.

A stack of three 4-inch thick mattress toppers

Maximum Stability and Edge Support

The additional foam in a 4-inch topper reinforces the entire mattress surface, preventing any sagging, instability or craters introduced by the mattress below. Reinforced edges ensure consistent support no matter where you sleep and ease entry/exit.
Ideal for Larger Frames

Heavier sleepers with larger body types will benefit from the added depth of the 4-inch topper, as it offers more substantial support to prevent sinking and promote proper alignment throughout the night.
That "Hotel-Like" Feel at Home

The premium depth of the 4-inch topper adds a level of luxury that mimics the feel of high-end hotel mattresses. Our 4 inch toppers can turn your bed into an indulgent retreat of plush, cloud-like comfort or deliver the superior contouring of a custom mattress, both typically reserved for five-star stays.

NYT Wirecutter's pick for Best Memory Foam Mattress Topper. 4-inch comfort level.

$143.96

High Density - Twin - 4 Inch

Orders placed by 2pm ships same day. Dual Layer Memory Foam + Pillow Top. Photo of a dual layer white mattress topper secured to a bed with an 18" deep pocket skirt.

$112.46

Hybrid Lux - Twin - 4 Inch

Photo of the black cooling cover unzipped and pulled back exposing the dual layered, copper infused foam of the mattress topper.

$149.95

Active Cooling - Twin - Black

Our 4" (Four Inch) Memory Foam Mattress Toppers

Select High Density

Viscosoft's best-selling Select High Density mattress topper combines four inches of premium, 3+ lbs. density memory foam with a washable, cooling cover designed for a perfect fit. The 4-inch topper provides a comfortably firm sleep surface that resists sinking, offering superior support for all body types. Its custom-fitted cover features a slip-resistant bottom and adjustable elastic straps, ensuring a secure, stable, and wrinkle-free sleep surface night after night.
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Hybrid Lux

The 4-inch hybrid topper combines 3 inches of gel-infused memory foam with a 1.5-inch plush fiberfill cover, creating a luxurious sleep surface that offers a significant comfort upgrade. Perfect for combination sleepers who frequently change positions, this 4+ inch topper provides enhanced support and softness. The cover is crafted from TENCEL™ fibers, offering superior breathability, moisture-wicking properties, and a silky-smooth feel, making it a step above ordinary cotton for an elevated sleep experience.
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Active Cooling

The 4-inch active cooling mattress topper features a smart blend of 2 inches of copper-infused premium foam and 2 inches of supportive foam, designed to relieve pain, promote hygenie, enhance deep sleep, and keep you elevated for optimal comfort. Its advanced, washable cover is crafted with cooling fabric that absorbs ambient heat and wicks away moisture, ensuring you stay cool, dry, and comfortable throughout the night.
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Upgrade Your Sleep, Not Your Budget

A Better Way to Great Sleep

With consumers seeking budget-friendly product alternatives, a premium mattress topper is an excellent alternative when replacing an aging mattress isn't feasible. If your mattress is sagging and causing discomfort, a four-inch mattress topper offers a transformative upgrade—delivering restful sleep for years, all at a fraction of the cost of a new mattress.

A woman laying on her side on a 4-inch thick mattress topper with an elastic strap attaching it to a mattress

A Variety of Toppers

We've Got Something for Everybody

We have a variety of different 4-inch thick mattress toppers, including high-density memory foam for pain relief, dual-layered pillow-top & memory foam for plush comfort, and copper-infused foam for cooling relief.

All of our 4-inch mattress toppers have a 90-day guarantee, fast & free shipping, and hassle-free returns.

Not the thickness you need?

Our mattress toppers are also available in the following thicknesses:

2-inch Mattress Toppers
3-inch Mattress Toppers
4-inch Mattress Toppers