Which pillow for back sleeping? The height you actually need

Lie on your back without a pillow. Your skull touches the mattress, your shoulders too, and between them there is a hollow at the neck. That hollow measures a few centimetres, it matches the natural curve of the neck. It is all the pillow has to fill in this position. Compare that with side sleeping, where the equivalent of a shoulder width has to be filled.

The aim is the same in every position: keep head, neck and spine on one line. But the tool has to be far more discreet. A 12 cm pillow on the back does not support better, it deforms. Many people who complain that they sleep badly on their back are in fact sleeping with a pillow designed for another position altogether.

Too thick, the pillow pushes the head forward. The chin comes closer to the chest and the neck stays stretched for seven hours. The discomfort is often felt at the base of the skull on waking, sometimes between the shoulder blades. Breathing is also less free in that position, which explains why some people snore more with a thick pillow on their back than with a flat one.

There is a less visible effect too. When the head is too high, the shoulders often stay off the pillow and the upper back rests on nothing continuous. The body then looks for a fallback position and rolls onto the side in the middle of the night, at a height that was never planned for it. You wake up without knowing why the night was broken up.

Once the sinking of the skull into the pillow is taken into account, most adults who sleep on their back land around 6 to 8 cm of useful height. That is the zone covered by the low wave of the Nuage 50, at 7 cm. Here again the shape does as much as the height: the relief rises under the neck to occupy the hollow, then comes back down under the skull so as not to push the head forward.

Slow rebound foam is useful here for a precise reason. On the back, the weight is spread over a small surface, at the back of the skull. A classic filling hollows out there quickly and leaves the neck unsupported after a few minutes. Foam sinks then stabilises, and the part supporting the neck stays in place, which is exactly what this position asks for.

Most people do not sleep in a single position. You fall asleep on your back, end up on your side, and return to your back in the early morning. The problem is well known: the ideal height is not the same in both cases, roughly double from one to the other. Picking an in between pillow gives an average compromise, slightly too high on the back and slightly too low on the side, so never really right.

The simplest answer is a pillow that carries both heights. On the Nuage 50, the 10 cm wave serves side sleeping, the 7 cm wave serves back sleeping, and you move from one to the other by turning the pillow over. In practice, set it for the position you spend the most time in, then test the other face for a few nights. If neck discomfort lasts or wakes you, the opinion of a health professional remains the right step.