Side sleeping is the most popular sleep position in the world — and for good reason. It reduces snoring, can ease acid reflux, and is recommended during pregnancy. But here's the catch: most mattresses are designed and tested from a back-sleeping perspective, leaving side sleepers with sore shoulders, aching hips, and a spine that's been under lateral stress all night.

The right mattress for a side sleeper looks very different from what a back sleeper needs. At LA Mattress Store, we've guided thousands of LA-area side sleepers to the perfect sleep surface — one that cradles their curves, keeps their spine aligned, and eliminates the morning shoulder pain that many assume is just part of life. This guide covers everything you need to know.

Side sleeper position - mattress with proper pressure relief for shoulders and hips

01Why Side Sleepers Need a Different Mattress

When you sleep on your side, your body isn't a flat surface resting on the mattress — it's a contoured shape with two prominent pressure points: your shoulder and your hip. These two points bear the majority of your body weight, and they're separated by a narrower waist that hangs in the air.

This creates a fundamental challenge:

  • On a too-firm mattress: Your shoulder and hip are pushed upward, your waist drops down, and your spine curves laterally — creating a "banana spine" that strains your lower back muscles and compresses your shoulder joint all night.
  • On a too-soft mattress: Your shoulder and hip sink too deep, your spine curves the other direction, and you often wake up having rolled onto your stomach — another unfavorable position.
  • On the right mattress: Your shoulder and hip sink in just enough to keep your spine horizontal and straight, your waist is gently supported (not hanging), and your muscles can fully relax for 7–9 hours.

The difference between "good" and "bad" for a side sleeper is often as little as one firmness level. This is why we always recommend testing a mattress in the showroom in your actual sleep position — what feels right standing up is almost meaningless for your side-sleeping spine.

Side sleepers also tend to experience more shoulder-specific issues: the shoulder is a complex joint that gets no rest on a hard surface, contributing to rotator cuff inflammation, shoulder bursitis, and general impingement over time. A mattress with proper shoulder-zone pressure relief is genuinely therapeutic.

02What to Look for in a Side Sleeper Mattress

Several factors separate a great side sleeper mattress from a mediocre one. Here's our priority list:

Pressure Relief at Shoulders and Hips

This is the defining quality of a side sleeper mattress. You need the comfort layer to allow your shoulder and hip to sink in enough to remove concentrated pressure, without bottoming out into the support core. Look for:

  • Thick comfort layers — at least 3–4 inches of foam or latex above the support core
  • Memory foam or latex in the comfort zone, which contour around irregular body shapes better than polyfoam alone
  • Zoned pressure relief — some mattresses have softer zones specifically at the shoulder and hip areas
  • Individually wrapped coils (in hybrids) — these allow independent movement at each pressure point

Contouring

Contouring refers to how closely the mattress surface follows the shape of your body. For side sleepers, deep contouring is essential — especially at the shoulder and hip. The better the mattress contours to your curves, the more evenly your weight is distributed, and the less concentrated pressure you experience at those two critical points.

Memory foam provides the deepest contouring. Latex provides good contouring with more bounce. Pocketed coils in hybrids contour well at a macro level, especially when paired with a foam or latex comfort layer.

Note: "Contouring" and "support" are not the same thing. A mattress can contour well but still let you sink too deep (unsupportive) or contour poorly but still support the spine (like a flat, rigid surface). You need both.

Firmness — Medium to Medium-Soft (4–6/10)

Most side sleepers do best in the medium to medium-soft range — roughly 4–6 on a 10-point firmness scale. However, body weight plays a significant role:

  • Lightweight side sleepers (under 130 lbs): Medium-soft to soft (3–5/10) — lighter bodies don't compress the mattress as deeply, so you need more give from the start
  • Average weight side sleepers (130–230 lbs): Medium (5/10) — the most versatile firmness for most side sleepers
  • Heavier side sleepers (230+ lbs): Medium-firm (6/10) — more body weight compresses the mattress deeper, so you need more initial resistance to prevent sinking too far

Material Considerations

Beyond firmness, the materials in the comfort layer affect temperature, responsiveness, and durability:

  • Memory foam: Deepest contouring, best motion isolation, but can sleep warm. Ideal for pressure-sensitive side sleepers.
  • Latex: Good contouring with bounce, sleeps cooler, more responsive for position changes. Better for hot sleepers and combination side sleepers.
  • Pocketed coils + foam (hybrid): The best of both worlds — targeted support from coils, pressure relief from foam. Better airflow than all-foam.
  • Pillow top / Euro top: Extra cushioning sewn into the mattress top, providing immediate plushness at the shoulder zone. Works well for side sleepers but varies by brand.
Helix Midnight Elite hybrid mattress - medium feel ideal for side sleepers

03Best Mattress Types for Side Sleepers

Here's how each major mattress type performs for side sleeping specifically:

Memory Foam — Top Pick for Deepest Contouring

Memory foam is purpose-built for side sleepers. It responds to body heat and pressure to conform precisely to your shape — allowing your shoulder and hip to sink in while supporting the curves in between. No other material matches its ability to eliminate pressure points at the shoulder zone.

Advantages for side sleepers:

  • Exceptional pressure relief at shoulders and hips
  • Deep contouring that follows your body's curves
  • Superior motion isolation — ideal for couples
  • No squeaking or noise with movement

Watch out for: Traditional memory foam can retain heat. Look for gel-infused or copper-infused memory foam, or choose open-cell construction. Also, very deep memory foam can make position changes feel sluggish — which may be an issue for combination sleepers.

Browse our memory foam mattress collection for top-rated options.

Hybrid — Best Balance of Comfort and Support

Hybrid mattresses (pocketed coils + foam or latex comfort layers) are our most versatile recommendation for side sleepers — especially those who also sometimes sleep on their back, have a heavier build, or run warm at night. The coil system provides the structural support that keeps your spine aligned, while the comfort layer handles pressure point relief.

Advantages for side sleepers:

  • Targeted pressure relief from individually wrapped coils
  • Better airflow and temperature regulation than all-foam
  • More durable over time — coil systems maintain support longer
  • Better edge support — useful for couples or those who sit on the bed edge
  • Works well with adjustable bases

Explore our hybrid mattress collection — several are specifically designed with side sleepers in mind.

Latex — Responsive Pressure Relief

Natural latex offers a unique sleeping experience for side sleepers: it contours around your body like memory foam but bounces back quickly when you shift positions. This makes it excellent for combination side sleepers who move between side and back sleeping through the night. Latex also sleeps significantly cooler than memory foam.

Advantages for side sleepers:

  • Pressure relief without the "stuck" feeling of memory foam
  • Naturally cooler — great for hot sleepers in the LA climate
  • More responsive — easier position changes for combination sleepers
  • Hypoallergenic and resistant to dust mites
  • Exceptional durability (15–20 year lifespan)

Worth knowing: Natural latex mattresses are a premium investment. Dunlop latex tends to be firmer and denser; Talalay latex is lighter and more consistent — typically better for side sleeping.

04Our Top 5 Mattress Picks for Side Sleepers

Based on customer feedback, sleep consultant expertise, and real-world performance data, these are our top mattress recommendations for side sleepers available at LA Mattress Store locations.

1. Tempur-Pedic TEMPUR-Adapt Medium — Premium Contouring

The Tempur-Pedic TEMPUR-Adapt Medium is consistently our highest-rated recommendation for side sleepers seeking premium pressure relief. Tempur-Pedic's proprietary material — originally developed by NASA — adapts to your precise body weight, shape, and temperature, providing truly individualized contouring that no other foam material matches.

What makes it special for side sleepers: The TEMPUR material doesn't just push back evenly — it distributes your shoulder and hip load across a wider surface area, dramatically reducing peak pressure at those points. Side sleepers who've tried it consistently report zero shoulder pain upon waking, even after a full night on their side.

Best for: Pressure-sensitive side sleepers, those with shoulder injuries or arthritis, couples who need motion isolation, anyone willing to invest in the best.

Shop Tempur-Pedic mattresses →

2. Helix Midnight — Designed for Side Sleepers

The Helix Midnight is one of the most purposefully designed side-sleeper mattresses on the market. Its zoned support system features a softer zone precisely at the shoulder area to allow maximum pressure relief where side sleepers need it most, while firmer support in the lumbar zone keeps the spine from sagging laterally.

What makes it special for side sleepers: The shoulder-softening zone is a genuine differentiator — most mattresses treat the sleep surface uniformly, but the Midnight is engineered around side-sleeping anatomy. Many customers who've struggled with shoulder pain on other mattresses find immediate relief.

Best for: Side sleepers of average weight, those with shoulder or hip sensitivity, combination side/back sleepers, couples with similar sleep styles.

Shop Helix mattresses →

3. Stearns & Foster Lux Estate Medium — Luxury Cushioning

The Stearns & Foster Lux Estate Medium brings luxury craftsmanship to side sleeper comfort. Its IntelliCoil® HD system (with individually wrapped coils inside individually wrapped units) provides exceptionally nuanced support at every pressure point, while the multiple layers of premium foam and cashmere-blend quilting deliver a plush, cradling feel that side sleepers love.

What makes it special for side sleepers: The high coil count and multi-layer comfort system mean your shoulder and hip are cushioned at multiple levels — a more forgiving, graduated sink-in that feels luxurious without sacrificing spine support.

Best for: Side sleepers seeking hotel-quality luxury, those who want a premium aesthetic as well as function, couples who both sleep on their sides.

Shop Stearns & Foster mattresses →

4. Diamond Plush Hybrid — Value Pick

Diamond Mattress, a California-born brand, delivers excellent value without cutting corners on the materials that matter for side sleepers. Their Plush Hybrid features a generous comfort layer of adaptive foam atop a pocketed coil system, delivering the pressure relief side sleepers need at a more accessible price point than premium European brands.

What makes it special for side sleepers: The thick plush comfort layer provides immediate cushioning at the shoulder and hip, while the coil base prevents the "stuck in quicksand" feeling that plush all-foam mattresses can create.

Best for: Budget-conscious side sleepers, those upgrading from a very firm mattress, shoppers who want plush comfort without a premium price tag.

Shop plush mattresses →

5. Chattam & Wells — Ultra-Plush Luxury

For side sleepers who want the most indulgent, cloud-like sleep experience while maintaining proper spinal support, Chattam & Wells delivers. Handcrafted with premium natural materials including cashmere, wool, and silk in the comfort layers, these mattresses provide an unmatched tactile experience alongside serious structural engineering.

What makes it special for side sleepers: The natural fiber comfort layers are extremely breathable — crucial for hot sleepers in Southern California — while the high-count coil system ensures that the luxury surface doesn't come at the cost of spinal alignment.

Best for: Those seeking heirloom-quality sleep luxury, hot sleepers who also sleep on their sides, couples who want to invest in their best sleep ever.

Shop luxury hybrid mattresses →

05What Firmness Is Best for Side Sleepers?

We touched on this briefly above, but it's worth expanding. Firmness is highly personal — what feels "medium" to one person can feel firm or soft to another, depending on body weight and personal preference. Here's our detailed breakdown:

General firmness guide for side sleepers:

  • Petite side sleepers (under 130 lbs): Soft to medium-soft (3–4/10). Lighter frames don't compress the mattress much, so you need a surface that gives easily at the shoulder and hip.
  • Average-weight side sleepers (130–180 lbs): Medium-soft to medium (4–5/10). The sweet spot for most side sleepers.
  • Medium-build side sleepers (180–230 lbs): Medium (5/10). Enough firmness to maintain spine alignment as your weight compresses the mattress.
  • Larger-framed side sleepers (230+ lbs): Medium to medium-firm (5–6/10). You need a firmer baseline to prevent sinking past the comfort layer into the support core.

Additional factors that affect firmness choice:

  • Shoulder width: Broader shoulders need more give — lean toward the softer end of your range
  • Hip-to-waist ratio: More pronounced curves need more contouring — consider softer or deeper comfort layers
  • Sleep partner: If your partner sleeps on their back, a medium mattress often works for both
  • Temperature: Softer foam sleeps warmer — if you run hot, consider a soft hybrid rather than a soft all-foam

The best way to determine your ideal firmness? Come into any of our LA showrooms and test in person, in your actual sleep position, for at least 10–15 minutes per mattress.

Helix Midnight Core mattress lifestyle photo - pressure-relieving comfort for side sleeping

06Best Pillow for Side Sleepers

A great mattress can be undermined by the wrong pillow — and for side sleepers, pillow choice is especially critical. When you sleep on your side, you need a pillow that fills the gap between your shoulder and your head to keep your neck in neutral alignment with your spine.

What to look for in a side sleeper pillow:

  • Height (loft): Medium to high loft — roughly 4–6 inches — to fill the shoulder-to-head distance. Broader shoulders need higher loft.
  • Firmness: Medium-firm to firm — soft pillows compress too much and let your head tilt downward, stressing the neck.
  • Contouring: Memory foam or latex pillows contour to the head and neck, providing consistent support throughout the night.
  • Between-the-knees: A body pillow or knee pillow between your knees keeps your hips stacked, dramatically reducing lower back and hip strain.

For our complete guide on pillows for side sleepers, see our article on the best pillows for side sleepers. You can also browse our full pillow collection at LA Mattress Store.

07Side Sleeping Tips for Better Comfort

Even with the perfect mattress and pillow, a few habits can dramatically improve side sleeping comfort:

  • Use a pillow between your knees. This is the single most impactful side sleeping upgrade you can make outside of the mattress itself. It keeps your hips level, reducing the hip drop that strains the lower back. Even a rolled-up blanket works in a pinch.
  • Sleep on your left side when possible. Left-side sleeping is associated with reduced acid reflux, better lymphatic drainage, and improved circulation. The liver sits on the right side of the body, and sleeping on the right can put pressure on it. Left-side sleeping during pregnancy is specifically recommended by OBGYNs.
  • Keep your arms in front of you, not tucked under your body. Sleeping with your arm under your pillow or head compresses blood vessels and nerves, contributing to that "dead arm" feeling in the morning. Keep both arms in front of you, slightly bent.
  • Adjust your pillow height as your mattress breaks in. New mattresses soften slightly in the first few weeks as the comfort layers compress and conform to your body. You may need to adjust your pillow height slightly during the break-in period.
  • Rotate your mattress head-to-foot every 3 months. This promotes even wear and extends the pressure-relieving life of the comfort layer. (Note: Some mattresses are one-sided and shouldn't be flipped — check with us when you purchase.)

08Common Mistakes Side Sleepers Make

In our showrooms, we frequently encounter side sleepers who've been making the same mattress mistakes for years. Here are the most common ones — and how to fix them:

  • Choosing a firm mattress because they think it's "better for support."
    This is the #1 mistake we see. "Firm = supportive" is a myth for side sleepers. A firm mattress that doesn't allow shoulder and hip sink-in creates lateral spinal curvature. Support comes from the base layer, not the firmness of the surface.
  • Testing a mattress on their back in the showroom.
    Your back-sleeping assessment of a mattress is largely irrelevant if you're a side sleeper. Always lie on your side — in your actual sleep position — when evaluating. The feel changes significantly.
  • Using a pillow that's too thin.
    A thin pillow tilts the head down toward the shoulder, creating a lateral neck bend. Side sleepers almost always need more pillow height than they think.
  • Sleeping on an old mattress with deep body impressions.
    Once a mattress develops visible impressions deeper than 1 inch, a side sleeper's spine is essentially pre-curved into the mattress's valley. Time to replace.
  • Buying a mattress without considering their partner.
    If your partner is a back sleeper who needs medium-firm, and you need medium-soft, there's an irreconcilable difference — unless you choose a split-firmness solution or a mattress that performs well for both positions. Ask us about options.
  • Ignoring the knee pillow.
    More than half of the side sleepers we speak with have never tried sleeping with a pillow between their knees. Those who start almost never go back. It's the cheapest sleep upgrade available.
LA Mattress Store bedroom lifestyle - try side sleeper mattresses at our Los Angeles showrooms

09Frequently Asked Questions

What firmness mattress is best for side sleepers?

Most side sleepers of average weight (130–230 lbs) do best on a medium to medium-soft mattress (4–5/10 firmness). Lighter sleepers often prefer softer (3–4/10), while heavier sleepers may need medium (5/10) to prevent sinking too deeply. The key is that the mattress must allow your shoulder and hip to sink in enough to keep your spine horizontal and straight.

Is memory foam or a hybrid better for side sleepers?

Both can be excellent — it depends on your priorities. Memory foam provides deeper contouring and better motion isolation, making it ideal for very pressure-sensitive side sleepers or light couples. Hybrid mattresses sleep cooler, provide better edge support, and tend to be more durable, making them better for hot sleepers, heavier individuals, and combination side/back sleepers. We're happy to help you choose in our showrooms.

Why does my shoulder hurt when I sleep on my side?

Shoulder pain from side sleeping is almost always caused by one of three things: (1) your mattress is too firm and isn't allowing your shoulder to sink in, creating concentrated pressure on the shoulder joint; (2) your pillow is too thin, causing your neck to tilt and stress the shoulder; or (3) your mattress is sagging, creating a crater that your shoulder is compressed into. A medium to medium-soft mattress with good pressure relief typically resolves issue #1.

Can side sleeping cause hip pain, and can a mattress fix it?

Yes and yes. Hip pain from side sleeping is a classic symptom of a mattress that's too firm — the hip is pressing against a surface that won't give, creating constant pressure on the greater trochanter (the bony prominence on the outside of your hip). Switching to a softer comfort layer with better pressure relief almost always resolves this. A mattress with targeted hip-zone pressure relief or a thick memory foam comfort layer is specifically therapeutic for this issue.

Should side sleepers use a body pillow?

Body pillows can be excellent for side sleepers, especially if you hug something in your sleep. They provide something for your top arm to rest on (preventing shoulder rollback), and they can serve as a knee separator. Pregnancy pillows are an extreme version of this concept, but even a basic full-length body pillow can improve side sleeping comfort significantly. Browse our pillow collection for options.

10Find Your Perfect Side Sleeper Mattress

Side sleeping is great for your health — but only if your mattress is doing its job. The right sleep surface keeps your spine aligned, eliminates pressure at the shoulder and hip, and lets you wake up the way you should: feeling like you actually slept, with no new aches to explain away.

Ready to find your match? Our LA showrooms let you test every mattress on this list in your actual sleep position, with a sleep consultant guiding your assessment. We'll help you identify what your body needs and narrow down options that genuinely fit.

We offer:

  • 🚚 Free delivery and setup throughout Greater Los Angeles
  • 💳 Flexible financing — 0% APR promotions available
  • 🛏️ Old mattress removal — we haul it away
  • 👨‍⚕️ Expert guidance from trained sleep consultants

Shop by mattress type for side sleepers:

Or walk into any of our five showrooms — find your nearest location at LA Mattress Store Locations. No pressure, ever — just honest guidance from sleep experts who genuinely care about your sleep quality.

LA Mattress Store has been serving Southern California since 1989. We believe the right mattress changes your life — and we take that responsibility seriously, one side sleeper at a time.