A good mattress avoids pressures on the body.

TOO HARD MATTRESS CAN COMPRESS THE BLOOD VESSELS
An inappropriate mattress can cause awakenings with strong pains or tinglings in the limbs. During the night,indeed,if you sleep on a too hard mattress, the body meets an unnatural strenght that can compress the blood vessels with particular effects on cir- culation. Choosing a top quality mattress, designed to support in the right way the natural shapes of the body,it facilitates a full well-being rest.