Most pillows marketed for neck pain are a single fixed shape at a single fixed height, which assumes every neck and every sleep position is the same. In practice, that's exactly what causes the two most common alignment errors.
Too high, and your neck is pushed into flexion. Too low, and it drops into extension. Both put direct strain on the same upper cervical joints that trigger the pain at the base of your skull.
A standard memory foam contour pillow can only be built for one of these, not both, and definitely not for every sleep position.
Puria's adjustable loft lets you dial in the exact height your neck needs to stay level, correcting both alignment errors, in every position, on the same pillow.