Hydropool Serenity Spa Pillow
This kidney shaped pillow is a replacement for pillows in all Serenity spas.
It is also used as the small pillow in the Self Clean 495.
These pillows will only fit into models if they were produced after 2010 until 2015
As of 2014, it has also been used on LaZBoy Signature Series Spas.
The pillow slides into place being held in the shell by a "tongue and groove" design.