84% RH is for: Seasoning wood humidors before adding cigars Completely humidifying the cellular structure of the wood inside humidors Preventing new humidors from robbing moisture from cigars and Boveda 72% RH maintenance packs Re-seasoning wood humidors A Single Size 60 is for: Up to a 25-count humidor. (For larger humidors, use one Size 60 for every 25 cigars your humidor can hold.)