Mattress Firmness Guide: Soft, Medium or Firm - What's Best?

Mattress firmness is measured on a 1-10 scale, where 1 is extremely soft and 10 is rock hard. Most people do best with medium (5) to medium-firm (6-7) mattresses. The ideal firmness depends on your sleeping position, body weight, and any pain conditions. Side sleepers prefer softer; back and stomach sleepers prefer firmer.

The Firmness Scale Explained

Extra Soft (1-2)

Feels like sinking into clouds. Minimal support; body sinks deeply. Best for very lightweight sleepers or extreme pressure relief seekers. Not recommended for back or stomach sleepers.

Soft (3-4)

Contouring, plush feel with good pressure relief. Suitable for side sleepers and lightweight individuals. May lack support for heavier sleepers.

Medium (5)

Balanced feel—not too soft, not too firm. Works for most sleepers. Good for combination sleepers and average-weight individuals.

Medium-Firm (6-7)

Slight sinking with strong support. Ideal for back sleepers, average-weight to heavy individuals, and those with back pain. The most popular firmness range.

Firm (8-9)

Minimal sinking; highly supportive. Best for stomach sleepers, heavy individuals, and those needing maximum spinal support. May feel too hard for side sleepers.

Extra Firm (10)

Rock-hard, minimal comfort. Limited applications. Not recommended for most sleepers; only for those with extreme support needs.

Firmness by Sleeping Position

Back Sleepers

Ideal firmness: 6-7 (medium-firm). Back sleepers need support to maintain the spine's natural lumbar curve. Too soft causes sagging; too firm causes pressure.

Side Sleepers

Ideal firmness: 4-6 (soft to medium). Side sleepers need pressure relief at hips and shoulders. Too firm causes pressure accumulation; too soft lacks support.

Stomach Sleepers

Ideal firmness: 7-8 (firm). Stomach sleeping strains the neck; firmness minimizes spinal curvature. Soft mattresses allow excessive sinking.

Combination Sleepers

Ideal firmness: 5-6 (medium to medium-firm). Adaptability is key. Medium firmness accommodates transitions between positions.

Firmness by Body Weight

Heavier individuals need firmer mattresses to prevent excessive sinking. Lighter individuals can enjoy softer mattresses while maintaining adequate support.

• Lightweight (under 60kg): Soft (4-6) mattresses feel supportive; firmer options feel uncomfortable

• Average (60-100kg): Medium (5-7) works best; widest comfort range

• Heavy (over 100kg): Medium-firm to firm (6-8) prevents excessive sinking

Singapore Climate Consideration

Singapore's tropical heat influences firmness choice. Firmer mattresses tend to sleep cooler with better airflow. If you're a hot sleeper in Singapore, consider medium-firm (6-7) over softer options. Pair with a cooling mattress topper if needed.

Can You Change Firmness?

Yes! Mattress toppers offer an affordable solution. A softer topper on a firm mattress reduces pressure; a firmer topper on a soft mattress adds support. This avoids full mattress replacement costs.

FAQ

Is medium the best firmness?

Medium (5) is a safe middle ground but not ideal for everyone. Your sleeping position and body weight matter more than general recommendations.

How long does it take to adjust to a new firmness?

Most people adjust within 30 days, though 60 days is more realistic for significant firmness changes. Stick with it before deciding if it's wrong for you.

Can firmness change over time?

Yes. Mattresses soften with use over years. What feels medium-firm today may feel medium in 5 years. This is normal degradation.

Conclusion

Finding your ideal firmness is personal. The MattX® DUAL Mattress solves the dilemma with flippable firmness—one side medium, one side medium-firm. Or explore Affairs Living's full range from soft memory foam to firm orthopedic support to find your perfect match.