The best mattress for you depends largely on how you sleep. Back sleepers need balanced support, side sleepers need pressure relief at the shoulders and hips, and stomach sleepers need a firmer surface that keeps the hips from sinking. Pick the wrong match and you may wake up with a stiff neck, sore shoulders, or lower back pain. Pick the right one and your spine stays in a neutral line all night, so your muscles can actually relax. This guide explains what each sleep position needs, which firmness levels and materials work best, and how to choose when you or your partner switch positions during the night. Quick answer Side sleepers: soft to medium (4 to 6) Back sleepers: medium-firm (5 to 7) Stomach sleepers: firm (6 to 8) Combination sleepers and couples: medium (5 to 6) Why Your Sleep Position Matters When Choosing a Mattress Your sleep position decides where your body weight concentrates and which joints press hardest into the mattress. A good mattress responds to that pressure so your spine keeps its natural curve, whether you lie on your back, side, or stomach. Two qualities do most of the work: Support: how well the mattress holds up your heaviest areas, mainly the hips and torso, so they don't sag out of alignment. Pressure relief: how well the comfort layers contour to bony points like the shoulders and hips so they don't take all the force. Every position needs both, but in different proportions. That is why mattress firmness is usually described on a 1 to 10 scale, where 1 is very soft and 10 is very firm. Most sleepers land between 4 and 8, and your position is the best starting point for narrowing that range. Best Mattress for Back Sleepers The best mattress for back sleepers is medium-firm, around 5 to 7 on the firmness scale. It supports the lower back while letting the hips sink just slightly, which keeps the spine in a neutral line. What back sleepers need When you lie on your back, your weight spreads fairly evenly, but the lumbar region tends to lose contact with the mattress. A surface that is too soft lets the hips sink and flattens the lower back curve. A surface that is too firm leaves a gap under the lumbar area and pushes pressure into the tailbone and shoulder blades. Recommended firmness and materials Firmness: medium-firm (5 to 7). Heavier back sleepers may prefer the firmer end of that range. Hybrid mattresses: pocketed coils give strong lumbar support, while foam layers on top add contouring. Zoned support: firmer zones under the hips and softer zones under the shoulders help with alignment. Signs your mattress isn't right for back sleeping You wake up with lower back stiffness that eases as the day goes on. You can slide your hand easily under your lower back while lying flat. You notice a visible dip where your hips rest. BedStory pick for back sleepers Top pick BEDSTORY SPINEALIGN® Hybrid Mattress Best for back sleepers who need lumbar support 5-zone support and reinforced foam keep the lower back aligned. Available in medium firm, firm, or extra firm. Shop BEDSTORY SPINEALIGN® → Best Mattress for Side Sleepers The best mattress for side sleepers is soft to medium, around 4 to 6 on the firmness scale. It lets the shoulders and hips sink in enough to keep the spine straight from neck to pelvis. What side sleepers need Side sleeping is the most common position, and it puts the most pressure on the smallest area of the body. Your shoulder and hip carry most of your weight. On a firm mattress, those points press hard into the surface, which can cause numbness, tingling, and shoulder or hip pain by morning. At the same time, a mattress that is too soft lets your midsection sag, bending the spine sideways. The goal is deep contouring at the shoulders and hips with enough support underneath to hold the waist level. Recommended firmness and materials Firmness: soft to medium (4 to 6). Lighter sleepers often prefer 4, while heavier sleepers do better around 6. Memory foam: excellent pressure relief because it contours closely to curves. A cooling memory foam mattress also helps side sleepers who tend to sleep hot, since more body contact means more trapped heat. Hybrid with a thick comfort layer: combines cushioning on top with coil support below. Latex: buoyant contouring for side sleepers who dislike the slow sink of memory foam. Tips for side sleepers Use a thicker pillow that fills the space between your ear and shoulder. Place a pillow between your knees to keep the hips stacked and reduce lower back strain. Switch sides during the night if one shoulder often feels sore. BedStory picks for side sleepers Top pick COOLING COLLECTION Memory Foam Mattress Best for side sleepers and hot sleepers Gel memory foam cradles the shoulders and hips, while a cool-to-the-touch cover helps keep heat down. Shop COOLING COLLECTION Memory Foam → COOLING COLLECTION Hybrid Mattress Best for side sleepers who want more bounce Gel memory foam over pocketed coils adds pressure relief with extra airflow. Available in medium plush, plush, or ultra plush. Shop COOLING COLLECTION Hybrid → Best Mattress for Stomach Sleepers The best mattress for stomach sleepers is firm, around 6 to 8 on the firmness scale. A firmer surface stops the hips from sinking and arching the lower back. What stomach sleepers need When you sleep on your stomach, your hips and abdomen are the heaviest part of your body pressing down. On a soft mattress they sink first, creating a U-shape in the spine that strains the lower back. Stomach sleepers also turn their heads to one side for hours, which can stiffen the neck. A firm, even surface keeps the body flat. Thin comfort layers still matter, though, because the chest, ribs, and knees need a little cushioning. Recommended firmness and materials Firmness: firm (6 to 8). Heavier stomach sleepers usually prefer 7 to 8. Hybrid or innerspring: coil systems provide the strong, even support stomach sleepers need. Firm latex: responsive and supportive, with a gentle surface feel. Memory foam with a dense base: works if the comfort layer is thin and the support core is firm enough to resist hip sink. Tips for stomach sleepers Use a thin pillow, or none at all, to keep your neck closer to neutral. Try a slim pillow under your hips if you wake with lower back pain. Consider gradually training yourself toward side sleeping if neck pain persists. BedStory picks for stomach sleepers Top pick Platin Extra Firm Hybrid Mattress Best for stomach sleepers An extra-firm, low-sinkage surface keeps the hips level, with pocketed coils that limit motion transfer. Shop Platin → Sacred Wood Extra Firm Mattress Best for heavier stomach sleepers (230+ lbs) Rated 8 to 9 out of 10 for firmness, with reinforced coils and high-density foam that resist sagging. Shop Sacred Wood → BEDSTORY SPINEALIGN® Hybrid Mattress Best for sleepers who switch between stomach and back Choose firm or extra firm for zoned support that works in both positions. Shop BEDSTORY SPINEALIGN® → Best Mattress for Combination Sleepers The best mattress for combination sleepers is medium, around 5 to 6, with a responsive feel that makes changing positions easy. If you start on your side, roll to your back, and end up on your stomach, you need a middle ground. Choose the firmness that suits the position you spend the most time in, then lean slightly toward medium. Hybrid and latex mattresses work well because they bounce back quickly, so you don't feel stuck when you turn. Top pick COOLING COLLECTION Hybrid Mattress Best for combination sleepers Responsive pocketed coils make it easy to change positions, while gel memory foam cushions the shoulders and hips. Shop COOLING COLLECTION Hybrid → Choosing a Mattress for Couples with Different Sleep Positions When partners sleep differently, a medium to medium-firm mattress (5 to 6) is usually the best compromise. It gives a side sleeper some pressure relief while still supporting a back or stomach sleeper. Look for good motion isolation so one partner's movement doesn't wake the other. Memory foam is especially strong here. Edge support also matters if you share a smaller bed and often sleep near the sides. Top pick COOLING COLLECTION Hybrid Mattress Best for couples who share a bed Pocketed coils and gel memory foam limit motion transfer, while the breathable build keeps heat from building up between two sleepers. Reinforced edges add stable space near the sides. Shop COOLING COLLECTION Hybrid → BEDSTORY SPINEALIGN® Hybrid Mattress Best for couples who prefer firmer support Choose medium firm if one partner sleeps on their back or stomach. Pocketed coils still help limit motion. Shop BEDSTORY SPINEALIGN® → Mattress Firmness by Sleep Position: Quick Comparison Sleep position Ideal firmness (1–10) Main need Best materials Pillow tip Side 4–6 (soft to medium) Pressure relief at shoulders and hips Memory foam, hybrid, latex Thick, plus one between knees Back 5–7 (medium-firm) Lumbar support Hybrid, memory foam, zoned support Medium loft Stomach 6–8 (firm) Keep hips from sinking Hybrid, innerspring, firm latex Thin or none Combination 5–6 (medium) Easy movement, balanced support Hybrid, latex Adjustable loft Couples (mixed) 5–6 (medium to medium-firm) Compromise plus motion isolation Memory foam, hybrid Each partner's own Other Factors to Consider Beyond Sleep Position Body weight: heavier sleepers (over about 230 lb) sink deeper and usually need one or two points firmer than the ranges above. Lighter sleepers (under about 130 lb) often feel a mattress as firmer than its rating and may prefer one point softer. Temperature: if you sleep hot, look for cooling foams, gel infusions, breathable covers, or coil layers that improve airflow. Back or joint pain: medium-firm mattresses are often recommended for lower back pain, but a doctor or physical therapist can advise on your specific condition. Mattress age: most mattresses lose support after 7 to 10 years. Sagging or lumps undo the benefits of the right firmness. Trial period: it takes about 30 days for your body to adjust to a new mattress. A long sleep trial, like BedStory's 365-night trial , gives you time to judge comfort in your own bedroom. How to Choose the Right Mattress for Your Sleep Position Identify your main sleep position. Notice how you fall asleep and how you wake up, or ask your partner. Find your firmness range in the comparison table above. Adjust for your body weight and any pain points. Choose a material based on feel, temperature, and motion isolation. Buy from a brand with a generous trial and return policy so you can test it at home. Frequently Asked Questions What is the best mattress firmness for most people? Medium-firm, around 6 on a 10-point scale, suits the widest range of sleepers. It balances support and pressure relief for back sleepers and many combination sleepers. Is memory foam good for side sleepers? Yes. Memory foam contours closely around the shoulders and hips, which relieves the pressure points side sleepers feel most. Choose a cooling memory foam if you tend to sleep hot. Can a mattress be too firm for back sleepers? Yes. A mattress that is too firm leaves a gap under the lower back and concentrates pressure on the tailbone and shoulder blades. Medium-firm is usually better than extra-firm. Why do stomach sleepers need a firm mattress? A firm mattress stops the hips and abdomen from sinking, which would otherwise arch the lower back and cause pain. What mattress is best if my partner and I sleep in different positions? A medium to medium-firm mattress with strong motion isolation is the best compromise. Memory foam and foam-topped hybrids both work well for couples. How long does it take to get used to a new mattress? Most people adjust within 2 to 4 weeks. Give a new mattress at least 30 nights before deciding whether it suits you. Conclusion: Match Your Mattress to How You Sleep Side sleepers do best on soft to medium mattresses that cushion the shoulders and hips. Back sleepers need medium-firm support for the lower back. Stomach sleepers need a firm surface that keeps the hips level. Start with your sleep position, adjust for body weight and temperature, and test your choice at home. If you want pressure relief without overheating, explore the BedStory cooling memory foam mattress , backed by a 365-night trial so you can find out how it fits the way you sleep. Not sure which mattress fits you? Every BedStory mattress comes with a 365-night home trial and free U.S. shipping. Shop all mattresses