If you are waking up with lower-back pain in Sydney in 2026, the most likely culprit in your bedroom is not your age or your posture - it is your mattress. This guide explains the science behind firm mattresses and back pain, what to look for in a genuine firm mattress, and how to find the right model for your specific situation.

If you've already decided you want a firm mattress - a genuine, supportive, Firm 8 out of 10 - the next question is which of the three Sleep Firm models is the right fit for your body, your budget, and your sleep style...