What's Inside Your Mattress? A Plain-Language Guide to Mattress Construction

01What's Inside Your Mattress?

Most people spend more time researching a new phone than a new mattress — even though the mattress affects 6–8 hours of every single day. If you've ever stood in a showroom wondering why two beds that look identical feel completely different, this guide is for you.

Understanding what's inside a mattress isn't about memorizing specs. It's about knowing what actually drives comfort, support, heat retention, durability, and price — so you can match a mattress to how you actually sleep.

03How Mattresses Are Built

Every mattress — regardless of type — has two functional zones:

• Support core: The foundation layer that keeps your spine aligned and prevents you from sinking too deep. This is usually the thickest part of the mattress.
• Comfort layers: The top layers that cushion pressure points, regulate temperature, and determine the overall feel of the bed.

The material used in each zone is what defines the mattress type and determines how it performs night after night.

04Memory Foam

Memory foam is polyurethane foam treated to be viscoelastic — meaning it responds to body heat and weight by conforming to your shape. When you press into it, it slowly molds around you. When you move, it gradually returns to its original shape.

What it feels like

A slow, cradling sensation. You feel "in" the mattress rather than "on" it. Motion is absorbed well, so a partner moving doesn't disturb you.

Modern improvements

Early memory foam had a reputation for sleeping hot. Most current memory foam mattresses address this with:

• Gel infusion — gel beads or swirls mixed into the foam to absorb and disperse heat
• Open-cell foam — a more breathable foam structure that allows airflow
• Copper or graphite infusions — thermally conductive materials that pull heat away from the body

Memory foam is a strong fit if you:

• Sleep on your side and need pressure relief at hips and shoulders
• Share a bed and need motion isolation
• Have chronic pain that responds well to contouring support
• Prefer a quieter, no-bounce feel

Less ideal if you:

• Sleep hot and run warm at night
• Prefer to feel "on top of" rather than "in" the bed
• Need easy repositioning throughout the night

Explore our memory foam mattress collection to see current options across every price range.

05Latex

Latex mattresses are made from rubber — either natural (tapped from rubber trees), synthetic, or a blend of both. The result is a responsive, buoyant feel that's distinctly different from memory foam.

What it feels like

Springy and supportive. Latex pushes back gently rather than cradling you. You feel supported on top of the surface rather than sinking into it. It responds instantly when you move, which makes repositioning easy.

Natural vs. synthetic vs. blended

• Natural latex — Most durable and eco-friendly. Naturally resistant to dust mites and mold. Typically more expensive.
• Synthetic latex — More affordable. Similar feel but shorter lifespan.
• Blended latex — A balance of durability and cost.

Latex is a strong fit if you:

• Want a responsive, bouncy feel — good for combination sleepers and couples
• Sleep hot and need a naturally breathable surface
• Have allergies (natural latex resists dust mites and mold)
• Want a durable mattress with a long lifespan (10–15+ years for quality latex)
• Prefer organic or eco-conscious materials

Less ideal if you:

• Have a latex allergy
• Prefer deep contouring and pressure relief over buoyancy
• Need to minimize motion transfer

Browse our latex mattress options — including natural and organic selections.

06Hybrid

A hybrid mattress combines a coil support system (usually pocketed coils) with one or more foam or latex comfort layers on top. The goal is to take the best qualities of both worlds: the responsiveness and airflow of coils with the comfort and pressure relief of foam or latex.

What it feels like

Balanced. You get some contouring at the surface while still feeling supported underneath. There's gentle bounce without the full springiness of an innerspring. Most people find hybrids easier to sleep "on top of" compared to all-foam beds.

What makes hybrids different from innersprings

The key difference is the comfort layers. An innerspring mattress has minimal padding on top of the coils. A hybrid has substantial foam or latex layers (typically 2–4 inches or more) that do real work for pressure relief and motion isolation.

Hybrid is a strong fit if you:

• Sleep hot and want good airflow (coils allow air to circulate)
• Want bounce and responsiveness alongside comfort
• Share a bed and want some motion isolation without all-foam deadness
• Are heavier and need strong underlying support from coils
• Want versatility — hybrids tend to work for a wider range of sleep styles

Less ideal if you:

• Need maximum motion isolation (coils transmit more movement than all-foam)
• Prefer the deep-sink feel of memory foam only

See our full hybrid mattress collection — one of our most popular categories.

07Innerspring

Innerspring mattresses use a coil system as both the support core and primary comfort surface. They're the oldest mattress technology and still widely used, though modern versions have improved significantly.

What it feels like

Bouncy, responsive, and firm. You feel on top of the bed. Traditional innersprings transfer motion more readily, which can be an issue for couples. But they sleep cool and are easy to move around on.

Coil types matter

• Pocketed coils (individually wrapped): Each coil moves independently. Better motion isolation and contouring. Used in most quality innerspring and hybrid mattresses.
• Bonnell coils: Hourglass-shaped, interconnected coils. Classic innerspring feel. More motion transfer but durable and affordable.
• Offset coils: Similar to Bonnell but designed to contour more closely to body shape.

Innerspring mattresses are worth considering if you sleep hot, prefer a traditional bouncy feel, or are working with a tighter budget. They're less competitive than hybrids and foam options for pressure relief and motion isolation.

08Side-by-Side Comparison

09Which Type Is Right for You?

Here's a quick decision framework:

• Side sleeper with shoulder or hip pain → Memory foam or soft hybrid
• Back or stomach sleeper → Medium-firm hybrid or latex for support without excessive sinking
• Hot sleeper → Latex or hybrid with pocketed coils and breathable foam
• Restless sleeper or couple → Memory foam (max isolation) or pocketed coil hybrid
• Eco-conscious buyer → Natural or organic latex mattress
• Heavier sleeper → High-density foam hybrid or thick latex for long-term support

The best way to know what works for your body is to actually lie down on different options. Our team at any of our 5 LA Mattress Store showrooms can walk you through the differences hands-on — no sales pressure, just honest guidance.

10Frequently Asked Questions

What's the most durable mattress type?

Natural latex consistently lasts the longest — often 10–15 years or more when cared for properly. High-quality hybrids and dense memory foam are close behind at 8–10 years. Budget innersprings tend to have the shortest lifespan.

Is memory foam bad for your back?

Not inherently. A well-designed memory foam mattress with proper support layers can be excellent for back pain. The issue is mattresses that are too soft, causing the hips to sink and the spine to fall out of alignment. Medium-firm is typically the sweet spot for back sleepers and those with back pain.

What does "coil count" actually mean?

Coil count refers to the number of springs in the mattress. Higher counts can indicate better contouring and support, but it's not the only factor — coil gauge (thickness), coil type, and the quality of comfort layers matter just as much. Don't choose a mattress based on coil count alone.

Is latex safe if I have allergies?

Natural latex is hypoallergenic for most people — it resists dust mites and mold. However, people with latex allergies (a sensitivity to rubber proteins) should avoid it. Synthetic latex does not contain the natural proteins that trigger latex allergies.

What's the difference between a pillow top and a Euro top?

Both are additional comfort layers sewn onto the top of the mattress. A pillow top is attached with a small gap, giving it a slightly rounded, cloud-like appearance. A Euro top is flush with the mattress edge for a more tailored look. In terms of feel, Euro tops tend to hold their shape better over time.