Our extra firm mattresses give you a very firm sleep surface with strong, lasting support to help keep your spine aligned. They are a great choice for back sleepers and stomach sleepers who need extra support to maintain a healthy posture and reduce pressure points. A firmer feel can also help heavier individuals or anyone who prefers a robust sleep surface. Available in all sizes, from small single and small double to king size and super king, the best extra firm mattress options include memory foam and natural fillings for added comfort. Wake feeling supported, comfortable, and refreshed.