Yes. Side sleepers benefit the most from a soft mattress because the extra cushioning relieves pressure at the hips and shoulders and helps keep the spine in alignment. Sam's Club carries soft memory foam or hybrid mattresses that work well for side sleepers.

For some people, yes. Back sleepers and stomach sleepers may find that a soft mattress lets the hips sink too deeply, which can throw off spinal alignment and lead to lower back discomfort over time. If you sleep on your back or stomach and back pain is a concern, a medium or firm mattress is usually a safer choice.

Soft mattresses with thick comfort layers can compress and soften further over time. Choosing a high-quality soft mattress with durable foam or coil construction and using a mattress protector can help extend the mattress's lifespan.