Hello there! It's a super common issue for a sofa bed to feel a bit too firm for comfortable sitting. You're definitely not alone in this. The main reason this happens is that the seat cushions on a sleeper sofa are usually much thinner than on a regular couch. They have to be shallow enough to accommodate the folded mattress and metal mechanism hiding underneath.
The great news is there's a very effective fix. The best way to make your sofa bed much more comfortable to sit on is to replace the foam inserts inside your existing seat cushions. This is a project you can likely do yourself. You can start by unzipping your cushion covers and removing the current foam block.
Your next step is to get new, higher-quality foam. You can find this at a local upholstery or foam supply shop, or even order it online. When you're choosing a replacement, look for high-density (HD) or high-resiliency (HR) foam, as this will provide better support and comfort than the standard foam that often comes with sofa beds. For an extra layer of softness and a nice, rounded look, you can ask for the foam to be wrapped in Dacron.
For an even more luxurious upgrade, you could have a down-blend envelope made to go around the new foam core. This will give you a much plusher and softer seat. Once you have your new inserts, it's just a matter of carefully stuffing them back into your cushion covers. It might be a snug fit, but that's what gives the cushion a full and inviting look. This simple change can make a world of difference in your daily comfort.
