Medical studies confirm that one of the most important factors for a good sleep is proper posture. In particular, the spine and especially the cervical spine must be aligned.
Choosing the right pillow helps align, as it fills the gap between the head and the mattress.
First 3D double
This pillow allows you to remove the inner second cushion and to choose the proper position and the correct height, relieving the neck and shoulders according to your own needs.