This range of Boveda Humidity Control Packs – 58% is available in 2 different sizes which are designed to be effective at controlling humidity levels in herbal preparations for various sizes of container.Your herbs will keep fresher and retain flavour for much longer if the relative humidity levels are both precise and constant. Boveda Humidipacs ensure two-way function using reverse osomosis membranes and then either absorb or release moisture, depending on whether the material to be conserved is too dry or too moist, thus maintaining a constant level for your herbs. This membrane does not allow for the transmission of the natural salts contained within.Boveda humidity packs have been certified as Food Safe by the FDA, have ISO certification and are also manufactured to GMP standards. Boveda Relative Humidity (RH) is accurate to within 1% in an air-tight container/environment. If using an actual wooden humidor it is usually the case that the RH of your humidor will become stable at anything up to 5 points lower than the Boveda RH you’re using. This is due to both humidor and ambient dryness levels.All Boveda packs should be replaced when they become rigid.Boveda is used by both cultivators and retailers in jurisdictions where cannabis is legal. Boveda is chosen for the following reasons important for cannabis preservation:Maintains precise RH for curing and storingRetains 15% more terpenesKeeps flower fresh for up to a yearSaves $100/lb from cannabis moisture lossProtects the medicinal qualities and potencyTakes away the harshness from smoking dry flowerEliminates mouldy buds and their associated health risksLocks in the aroma you can lose by varying humidity levelsThese Boveda 58% Humidity Control Packs are available in the following sizes: 4 gr. for up to 14 gr. (1/2 ounce) of cannabis8 gr. for up to 28 gr. (1 ounce) of cannabis67 gr. for up to 450 gr. ( 1 lb.) of cannabis320 gr. for up to 2.25 kg. (5 lb.) of cannabisN.B. These packs have a 2 year shelf-life.