Narhinel refills have an absorbent filter and are for use with the Narhinel soft nasal aspirator (sold separately). Nasal aspiration is recommended whenever your baby has a stuffy nose, whenever necessary and especially before feeding the bottle. The product has been designed to help clean baby's nose by gently removing annoying nasal secretions. The soft plastic inserts have been designed to fit perfectly and safely around the baby's nose. each individually packaged refill includes an absorbent filter to trap mucus, so the process is completely hygienic. Hygienic, safe and easy to use, the nasal aspirator with refills helps your baby breathe, eat, sleep normally and feel better again.