Y Lux Cushions: Contain a core of HR (high resiliency) 2.5 pound "Qualux" polyurethane foam banded with silicone impregnated polyester fiber. This cushion is then encased in a down proof tick cover and has a lifetime warranty on the foam.
Which should you get? Y Lux if anyone will be sleeping on this sofa or if you want a more plush sit. Its worth it.