The sofa will inevitably collapse if you sit for a long time. If it's only a little deformed locally, you can get rid of sofa cover and go to the sponge market to buy high-elastic sponge to fill it locally.

However, we must pay attention to the place where the sponge is newly replaced, and it is best to replace it with a larger area. Don't just replace the deformed piece, so the newly changed place will be deformed quickly.

The life of sofa is basically determined by the quality of sponge. It is difficult for consumers to identify the quality of sponges, so try to buy big brands of fabric sofas, and be careful to buy sofas with uneven feel or poor elasticity when sitting down.