Product of Luvs Pro Level Leak Protection Diapers, Size 4 (22-37 lbs.) 172 Count. Get Pro Level Leak Protection with Luvs. Designed with Triple Leakguards that help stop leaks before they happen. They also feature a Wetness Indicator that turns blue when wet. When it comes to bedtime, Luvs Nightlock Technology works to lock away wetness so your baby can dream on. For complete comfort, Luvs diapers are super soft on your baby’s skin with a comfy feel. Triple Leakguards help stop leaks before they happen. Secure and stretchy sides with comfy leak barrier cuffs. Wetness Indicator turns blue when wet, telling you when your baby needs a change. Luvs Pro Level Diapers, Leak Protection Diapers, Pro Diapers.