Look for a Medium-Firm feel (around a 6/10 on the firmness scale). It supports the natural "S-curve" of your spine without letting your hips sink too far.
If you’re waking up with a stiff lower back, the "firm is always better" myth might actually be making things worse. Research suggests that are generally the sweet spot for lower back pain, providing enough support to keep your spine neutral while cushioning your hips and shoulders. Quick Guide: Which Mattress Type Fits You? what mattress should i buy for lower back pain
A Hybrid or Latex mattress is best. These materials are "bouncy" and responsive, making it easier to change positions without feeling stuck. Top Mattress Recommendations (2026) Look for a Medium-Firm feel (around a 6/10