Mattress Firmness Guide

For our hybrid mattresses, firmness refers to how the comfort layer feels when you lie down. A thicker comfort layer or softer materials create more cushioning, while a thinner comfort layer or firmer materials create a more solid surface feel.

The right firmness balances cushioning and pressure relief without excessive sinking or pressure around the shoulders and hips. This depends largely on your sleeping position, BMI and age. Read on to find out more.

Sleeping Position

Different sleeping positions place different amounts of pressure on different parts of the body, so they require different mattress firmness for a comfortable night's sleep. See our recommended firmness for different sleeping positions.

Side Sleepers

Side sleeping places more pressure on the shoulders and hips. A softer, thicker comfort layer provides better contouring and helps relieve pressure.

If the Mattress Is Too Firm or Too Soft

Too Firm · Higher Concern More pressure can build around the shoulders and hips, causing aches.

Too Soft · Moderate Concern Too much hip sinking may affect spinal alignment.

Recommended Firmness

Soft

Med. Soft

Medium

Med. Firm

Firm

Best match for most sleepers in this group

Also suitable depending on BMI or age

Back Sleepers

Back sleeping distributes body weight more evenly. A balanced comfort layer supports the lower back while providing comfortable contouring.

If the Mattress Is Too Firm or Too Soft

Too Firm · Moderate Concern Too little contouring can leave a gap under the lower back, causing back pain.

Too Soft · Higher Concern Too much hip sinking can affect the natural alignment of the lower spine.

Recommended Firmness

Soft

Med. Soft

Medium

Med. Firm

Firm

Best match for most sleepers in this group

Also suitable depending on BMI or age

Stomach Sleepers

Stomach sleeping places more pressure on the chest and stomach. A firmer comfort layer helps prevent the midsection from sinking too deeply.

If the Mattress Is Too Firm or Too Soft

Too Firm · Lower Concern Too little cushioning may cause slight chest and stomach discomfort.

Too Soft · Higher Concern The midsection may sink too deeply, increasing the arch in the lower back.

Recommended Firmness

Soft

Med. Soft

Medium

Med. Firm

Firm

Best match for most sleepers in this group

Also suitable depending on BMI or age

Combination Sleepers

Combination sleepers change positions throughout the night. A balanced comfort layer provides contouring without excessive sinking.

If the Mattress Is Too Firm or Too Soft

Too Firm · Moderate Concern May feel uncomfortable around the shoulders and hips when side sleeping.

Too Soft · Moderate Concern Too much sinking may affect spinal alignment based on sleeping position.

Recommended Firmness

Soft

Med. Soft

Medium

Med. Firm

Firm

Best match for most sleepers in this group

Also suitable depending on BMI or age

Body Mass Index

Your BMI affects how much pressure is applied at each area on the mattress. Use it to slightly adjust your firmness choice from the best match option for better comfort and spinal alignment.

Lower BMI (<18)

People with a lower BMI usually place less pressure on the mattress and may not sink deeply into the comfort layers.

Recommended Adjustment

Starting from the best-match firmness for your sleeping position, consider going slightly softer for better contouring and pressure relief.

Moderate BMI (18 - 28)

People within this BMI range usually apply a balanced level of pressure on the mattress, so medium-feel comfort layers are generally suitable.

Recommended Adjustment

No adjustment is required. Go for the best-match firmness based on your sleeping position and this should suit most people within this BMI range.

Higher BMI (>28)

People with a higher BMI usually apply more pressure to the mattress, causing them to sink deeper into the comfort layers.

Recommended Adjustment

Starting from the best-match firmness for your sleeping position, consider going slightly firmer for better stability, less sinking and improved spinal alignment.

Age

Age can affect how much cushioning and pressure relief feels comfortable. Use it to slightly adjust your firmness choice from the best match based on your sleeping position.

Kids

Children are still growing, so maintaining good spinal alignment is especially important during sleep. A firmer mattress is typically better for this.

Recommended Adjustment

Starting from the best-match firmness for their sleeping position, consider going slightly firmer to prioritise spinal alignment and stable support.

Adults

Most adults can use the best-match firmness for their sleeping position, with BMI providing a more meaningful adjustment where needed.

Recommended Adjustment

No adjustment is required. Go for the best-match firmness based on your sleeping position, then adjust according to BMI if needed.

Seniors

As we age, getting in and out of bed can become more difficult. A firmer mattress provides a more stable surface to push against, while also helping maintain good spinal alignment during sleep.

Recommended Adjustment

Starting from the best-match firmness for your sleeping position, consider going slightly firmer for easier movement in and out of bed and more stable spinal support.