Designed with Triple Leakguards that help stop leaks before they happen. Nightlock Technology locks away wetness for up to 12 hours of overnight protection. Secure & Stretchy Sides With Comfy Leak Barrier Cuffs. Wetness Indicator turns blue when wet, telling you when your baby needs a change. No Parabens, No Latex* *Natural Rubber. For complete comfort, Luvs diapers are super soft on your baby's skin with a comfy feel, plus they're designed with larger, refastenable tabs for a secure fit.