Inserts

These differences are pretty pronounced, however. Feather fill is softer and more luxurious, letting you sink into the cushion further. PET, meanwhile, is much more firm and keeps cushions more plumb. It’s also hypo-allergenic thanks to its 100% recycled fibre content. This means there’s no clear cut winner between the two, as it depends on your needs: if you have allergy issues, it’s good to stay away from feather inserts. Meanwhile, if you want a soft, downy insert, PET is likely to be too stiff for your needs.