"This modification gives the Seating Specialist the ability to independently adjust the height of each side of the pelvis on obliquities that can be reduced. It also gives the ability to accommodate and equalize pressures on clients
with fixed obliquities. It can also be used as a ""pelvic well"" to reduce sitting pressures under the pelvis. Another use is to place speciality foams directly under the ischial tuberosities to decrease sitting pressure and increase user comfort. This modification is supplied with several different types of polyurethane and viscoelastic foams. Please specify overall foam thickness. Two inch foam thickness is standard and the minimum thickness recommended."