Using a liner in your birth pool isn’t just a nice extra—it’s an essential part of a safe, clean, and stress-free waterbirth. A fresh disposable liner ensures the pool stays fully sanitary, protects the birthing parent from lingering bacteria, and keeps the pool itself in perfect condition for future use. In this guide, we’ll explain exactly why every birth requires a new liner, how it protects both you and your equipment, and why professional pools like Birth Pool in a Box are designed to work with liners for maximum safety and convenience.