Memory foam is a polyurethane foam formulated to have a slow recovery to its original shape once depressed, which gives its ability to support without the pressure associated with conventional foam. Our pillows provide support for your neck and upper back, which is the most important role a pillow needs to fulfil when you are asleep. We need this support due to the human spine being naturally curved. Having this support for your head and neck helps to maintain proper alignment of those areas of the spine resulting in a perfect balance of total comfort and superior support throughout the night.