01Memory Foam Mattresses: What to Know Before You Buy

Memory foam is one of the most popular mattress materials for good reason. It conforms to your body, absorbs motion, and relieves pressure in ways traditional innerspring mattresses can't match. But not all memory foam mattresses are built the same, and the wrong one can leave you sleeping hot, sinking too deep, or waking up stiff.

This guide explains how memory foam works, what to look for when shopping, and which sleepers it works best for — so you can make a confident decision.

03How Memory Foam Works

Memory foam is made from viscoelastic polyurethane foam. It responds to body heat and pressure, softening and contouring to your shape as you lie on it. When you get up, it slowly returns to its original form — that's the "memory" part.

This material was originally developed by NASA for aircraft seat cushions. It found its way into mattresses in the late 1990s and has been refined significantly since then.

04Key Benefits of Memory Foam

  • Pressure relief: Memory foam distributes body weight evenly, reducing pressure at the hips, shoulders, and lower back. Particularly helpful for side sleepers and people with joint discomfort.
  • Motion isolation: If your partner moves in the night, you're unlikely to feel it. Memory foam absorbs motion rather than transferring it across the surface.
  • Body contouring: The foam shapes to your exact body position, supporting the natural curve of your spine rather than pushing against it.
  • Quiet: No springs, no noise. Memory foam mattresses are completely silent.
  • Durability: High-density memory foam holds up well over time. Quality mattresses typically last 8–10 years with proper care.

05Tradeoffs to Know

Memory foam isn't perfect for everyone. Know these before you buy:

  • Heat retention: Traditional memory foam traps body heat. If you sleep hot, look for gel-infused, copper-infused, or open-cell foam variants designed to sleep cooler.
  • Slow response: Memory foam takes a moment to adjust when you change positions. Some sleepers find this cumbersome, especially combination sleepers who move frequently.
  • Sinking feel: The contouring that makes memory foam great for pressure relief can make some people feel "stuck" in the mattress, especially with softer models.
  • Off-gassing: New memory foam mattresses can emit a chemical smell for the first few days. It dissipates quickly and is generally not harmful, but it can be noticeable.

06Types of Memory Foam

Not all memory foam is the same. Here's what the different formulations mean in practice:

Type What It Does Best For
Traditional memory foam Classic contouring and pressure relief Pressure relief, pain relief
Gel-infused foam Pulls heat away from body surface Hot sleepers
Copper-infused foam Cooling + antimicrobial properties Hot sleepers, hygiene-conscious
Open-cell foam Improved airflow through foam structure Temperature regulation
Plant-based foam Uses natural oils in formulation Eco-conscious buyers, reduced off-gassing

07Who Memory Foam Is For (and Who It's Not)

Good fit if you:

  • Sleep on your side and need shoulder/hip pressure relief
  • Share a bed and don't want to be disturbed by your partner's movement
  • Have back pain or joint discomfort
  • Prefer a mattress that conforms closely to your body
  • Sleep alone and don't move much during the night

May not be the best fit if you:

  • Sleep hot and haven't found a well-cooled foam option
  • Change positions frequently through the night
  • Prefer a bouncy, responsive feel (consider a hybrid or latex instead)
  • Are a heavy sleeper who needs more robust support from coils

For sleepers who want the contouring of foam with more responsiveness, a hybrid mattress — foam layers over a coil system — is often the better choice.

08What to Look For When Buying

Foam density

Density is measured in pounds per cubic foot (PCF). Higher density = more durable and more supportive, but also heavier and more expensive. For a mattress intended to last, look for comfort layers with at least 3–4 PCF and support cores at 1.5–1.8 PCF or higher.

ILD (Indentation Load Deflection)

ILD measures firmness. Lower ILD = softer. Higher ILD = firmer. Most memory foam mattresses for general use range from 10–16 ILD in the comfort layer. This number isn't always published but can be asked about in-store.

Cooling technology

If you tend to sleep warm, prioritize mattresses with gel or copper-infused foam, phase-change material covers, or open-cell construction. Marketing language alone isn't enough — test the feel in person.

Mattress thickness

Most quality memory foam mattresses are 10–14 inches thick. The comfort layer (the top portion of foam) typically accounts for 2–4 inches. Thicker comfort layers provide more contouring but also more sinkage.

Trial period

Your body needs time to adjust to a new mattress — typically 3–4 weeks. Look for a meaningful trial period before committing. LA Mattress Store offers a 120-night comfort guarantee on eligible mattresses.

09Featured Memory Foam Mattresses at LA Mattress Store

Here are some of the standout memory foam options available in our showrooms and online:

Serta iComfort Blue Max Touch 3000 Plush

A plush California King option with Serta's TempActiv Max Gel Memory Foam, Air Suspension Technology for airflow, and UltraCold System for temperature regulation. Best for: side sleepers and those who sleep warm. Not ideal for: those who prefer firm support.

Diamond Mattress Tundra Hybrid Copper Gel Firm

Copper gel memory foam with an innerspring support system. The copper infusion enhances cooling and offers antimicrobial properties. Best for: back and stomach sleepers, hot sleepers. Not ideal for: side sleepers who need a softer surface.

Tempur-Pedic TEMPUR-LuxeAdapt 13" Soft

Tempur-Pedic's TEMPUR-APR+ material provides exceptional pressure relief and adaptability. The SmartClimate Dual Cover System helps regulate temperature. Best for: those who want the deepest, most conforming foam feel. Not ideal for: budget-conscious shoppers or those who dislike sinking.

Sealy Posturepedic Performance Hybrid Kelburn II Medium

Sealy's Immersion Advanced Memory Foam with zoned support and DuraFlex edge system. A solid medium-feel hybrid for most sleepers. Best for: combination sleepers, couples. Not ideal for: those who want a very soft or very firm feel.

Visit one of our 5 LA showroom locations to test these in person. Our sleep advisors can walk you through the differences and help match you to the right option.

10Caring for a Memory Foam Mattress

  • Use a mattress protector from day one. Stains void most warranties. A waterproof protector protects both the mattress and your investment.
  • Rotate every 3–6 months (head to foot) to distribute wear evenly. Most memory foam mattresses are not designed to be flipped.
  • Use a proper foundation. Memory foam needs solid, even support. Sagging slats or a weak base can reduce mattress life and void the warranty.
  • Let it breathe. When possible, allow airflow around the mattress. If you notice odor from the foam, air the room out and it will dissipate.

11Frequently Asked Questions

What is a memory foam mattress?

A mattress made with viscoelastic polyurethane foam that responds to body heat and pressure, contouring to your shape for personalized support and pressure relief.

How long does a memory foam mattress last?

High-quality memory foam mattresses typically last 8–10 years. Longevity depends on foam density, how the mattress is used, and whether it's properly supported and protected.

Do memory foam mattresses sleep hot?

Traditional memory foam can retain heat. Modern versions with gel, copper, or open-cell construction sleep significantly cooler. If you're a hot sleeper, specifically look for mattresses with these features and test them in person.

Are memory foam mattresses good for back pain?

They can be, especially for side sleepers with hip or shoulder pain. The key is finding the right firmness — too soft and you'll sink too far, too firm and you won't get enough contouring. A medium or medium-firm memory foam or hybrid is the most common recommendation.

Can I use a memory foam mattress with an adjustable base?

Yes. Memory foam is one of the most compatible materials for adjustable bed bases. Its flexibility allows it to bend with the base without losing structural integrity.

How do I choose the right firmness?

Start with your sleep position: side sleepers generally need medium to medium-soft; back sleepers medium to medium-firm; stomach sleepers firm. Then test in person — firmness ratings vary by brand, and only lying on a mattress tells you how it actually feels for your body.

Are memory foam mattresses hypoallergenic?

Memory foam is naturally resistant to dust mites and allergens because it lacks the void spaces that traditional innerspring mattresses have. Many also come with hypoallergenic covers. A mattress protector adds an additional layer of protection.