sit between the Covers and the Inserts to make Sactionals even more resistant to life's messes. The Deep Back Pillow Insert Protector creates a liquid-resistant barrier between your favorite Sactionals Cover and your Deep Back Pillow Insert. This barrier helps avoid any damage to your Deep Back Pillow Insert that could be caused by spills soaking through, further extending the life of your Sactionals and allowing them to stay new.