A memory foam pillow is a type of pillow that is designed to conform to the shape of the head and neck in response to body heat and pressure. Memory foam pillows are made from viscoelastic material, which is a special foam that has the ability to conform to the user's shape.

When you lay your head on a memory foam pillow, the heat and pressure from your head soften the foam, allowing the pillow to conform to the unique shape of your head and neck. This can help reduce pressure points and relieve tension in your neck and shoulder muscles.

Memory foam pillows are also known for their ability to reduce movement during sleep. This means that if your partner moves during the night, you won't feel as much movement on their side of the bed.

Memory foam pillows come in a variety of sizes and shapes to suit everyone's sleeping preferences. They also come in a range of densities and firmnesses to suit individual support needs.

It is important to note that memory foam pillows may have an unpleasant odor when new, known as off-gassing. However, this odor usually disappears after a few days of airing.

In short, a memory foam pillow is a type of pillow that uses viscoelastic foam to conform to the shape of the head and neck. It can reduce pressure points and muscle tension, as well as movement during sleep.