Supersoft Biodegradable Nappy Liners allow moisture to pass through into the nappy and prevent it seeping back. These liners minimise soiling of the nappy and can be flushed away without harming the environment.100 Sheets per pack*Liners can be used in a septic tank sewage system but it is important that waste pipes are not in any way blocked prior to using them. No responsibility can be accepted for individual drain systems.