Foam
Foam-filled storage sofas are ideal if you're after a firm, structured look that doesn't sag with use. These sofas keep their shape well and need minimal upkeep. Just give the cushions a turn now and then to ensure even wear. Foam density can also be tailored to your preference — the higher the density, the firmer and more resilient your sofa.
Over the first six months, all new foam will soften a bit, losing around 15% of its hardness. Your foam storage sofa may feel a bit firmer at first but will settle in nicely over time. Rest assured, even as it softens, the sofa will maintain its overall volume and comfort level.
Feather
Unlike foam, feathers give a more relaxed and less structured appearance. You'll notice the cushions look generous and rounded. To maintain that plush, lived-in look, the cushions need regular plumping and turning. Feather sofas are a bit outdated these days, but you can still get your hands on them in some boutique shops.
Fibre
Fibre storage sofas, made from hollow polyester strands filled with air, offer a cosy and inviting feel as they compress when you sit. They give off a soft, relaxed vibe and look plump. However, these sofas need a bit of daily care — turning and plumping the cushions helps keep that sink-into-me comfort you love after a long day.
Blended Fillings
Blended storage sofa fillings are more popular these days. Instead of just using feathers, which can sometimes clump up, manufacturers now mix feathers with foam. This combination provides a more comfortable and supportive experience every time you sit down. It also helps the sofa maintain its shape better over time. Meanwhile, feathers combined with fibre add a bit more bounce and resilience to cushions.