The Keri High Back Cushion is for taller users who need lumbar support and enjoy comfort memory foam. This memory foam cushion uses the same technology and steel frame support of the Sacro Ease Keri Lumbar Cushion to soothe your high back. Since many chairs are made with flat backs that could do serious damage to you, the Keri High Back Lumbar Cushion actually has an ergonomic shape that fits around your upper back so it can feel supported rather than pressed against.