The B4 back cushion is one of our hot sale cushions. It is also our patent pillow. We call the pillow Boss. Different from other cushions for the waist, the height of this cushion determines that it can give an integral support to the back. For example, the curve in the middle can be fitted to the spine and the design at the top can support the column scapula .Its sides can be wrapped around the back as comfortable as two hands on the back. We also support OEM and ODM. Bravo is professional for every customer to need the requirment.