Memory Foam Pillows
Memory foam pillows provide great neck and head support. It's important to get the right thickness. If the pillow is too tall or too small, it may not provide the right support.
Pillows for Side Sleepers
When your body is on its side, there is a larger gap between the shoulder and head, so it's important to have a taller pillow to keep your neck aligned.
Most Side Sleeper Pillows will have a baffle of 1 to 2 inches along the side of the pillow, so it can loft taller and meet the height needed for side sleepers.
Pillows for Back Sleepers
When your body is on its back, you only need enough pillow to fill in the curve of your neck, and slightly raise the head. Too thick of a pillow can raise the head too much causing upper back and neck discomfort. If you are a back sleeper, look for a thin to medium size memory foam pillow that fills in the curve of your neck while allowing the back of your head to sit back.
Pillows for Stomach Sleepers
When your body is on its stomach, you must turn your head to breathe which can twist the upper spine. Most stomach sleepers do well with a thin pillow. Some prefer a medium to thin option then pull it more under the upper torso and not just under the neck. Either way, make sure it doesn't kink your neck back which can cause pain and discomfort.
There are solid memory foam pillows and crushed memory foam. The solid stays stationary and is not moldable or squish-able which keeps the support where you need it. Crushed memory foam pillows offer the ability to form the pillow into the shape you want and scrunch it into your neck line to get that support where you need it.