Large format 5.2" x 3.5" humidity control pack (62% RH). Measuring 5.2 x 3.5" Boveda's humidity control pack is ideal for larger cannabis storage such as mason jars or containers. These larger packs maintain 62% RH (relative hunmidity) in your dried flower with a patented two-way humidity control that responds to existing moisture conditions to keep your cannabis from drying out. By adding or removing moisture to affect the enclosed environment