These 2-way Boveda packs absorb and emits purified water vapor through a semi-permeable membrane so that it does not damage material through direct contact with moisture.
- 67 gram, 2-way Humidification packs.
- 69% Relative Humidity level.
- Perfect for herbal medicine or small home rolled cigars.
- These 60+ gram units that are good for use with up to 1 LB of tobacco.