Because deep seating cushions are deeper than traditional seat cushions, they often need to be just a bit firmer so you don’t sink back into the cushion and have difficulty getting/standing up. For deep seating cushions using our traditional polyurethane foam, we recommend starting with our medium Everflex™ V44 if your cushion is between 3 and 5 inches. If your deep seating cushion is thinner, you might consider firmer V54, and if thicker than 5–6 inches we recommend our softer V34. If you want luxurious, organic latex foam, we recommend medium N31 or medium-firm N36 for something firmer. For deep seating cushions, we do not recommend down or polyester envelopes, or memory foam as a top layer, as this will make it difficult to “get out” of the cushion. As always, contact our customer service team for help with ordering.