12 Pouches of 60g Boveda 72% RH Humidity Control Boveda maintains consistent (relative humidity) RH that's perfect for cigars. Use one Size 60 for every 25 cigars your container can hold. Example: For a 125-cigar capacity humidor, use five (5) Size 60 Boveda at once.Boveda Size 60 are the right choice for: Small to medium humidors, tupperdors, coolerdors, and travel cases For bigger humidors, use Size 320 Boveda. How to use: Boveda is safe to touch cigars. Remove a Boveda from the plastic bag. (Do Not Open the brown packet itself.) Place the Boveda in your humidor, tupperdor, coolerdor, humidor bag, or travel humidor. Close the container. That's it! Do Not mix different RH (Relative Humidity) levels within the same humidor. Do Not use Boveda in the same humidor with other humidification products because they'll counteract each other, and reduce the efficiency of the Boveda. Lifespan: Unopened, Boveda can last up to two (2) years. Once the plastic bag is opened, replace Boveda 2-way humidity packets every three months. Accuracy: Boveda maintains inside relative humidity (RH) of +/-2% when using the recommended number of packets. Factors that adversely affect the expected results include a drafty humidor and/or extreme dry ambient conditions. Product Dimensions: 3.5"/8.89 cm x 5.25"/13.335 cm