Sleep deprivation has a number of negative effects on a person’s overall health. It causes health problems especially when it develops into chronic sleep disorder. Lack of sleep also affects one’s concentration and memory. A good mattress is important to have that comfortable sleep that you need. Choose a mattress that will help your body retain ideal sleeping posture and allow you to sleep comfortably. If you intend to purchase one online, you can look for memory foam mattress at your favorite online retailer.