During active sitting on a horizontal surface - when the spine is not stabilized by the back of the seat - the pelvis tilts back sooner or later, which puts too much pressure on the frontal part of the intervertebral disks. Wedge pillows slightly tilt the pelvis upfront, thus making the pressure of the intervertebral disks' even, preserving the balance between abdominal and dorsal muscles, preventing spine problems.
Size: 35x35x9/1 cm
Material: heterogene foam rubber