Removable liners are a footstool lining within a footstool - think of it as a bladder. They are made of a silky and durable polyester fabric. They are easy to remove for when you want to wash the outer bag as they prevent spillage of the beans, we highly recommend this option. It also provides added security against unwanted opening of the bag. Please note: Footstools purchased without a removable liner are constructed differently to a footstool purchased with a liner. This means that you can not buy a liner in the future as the liner and the stool will not be compatible.