Boveda packs are one of those boring essential products that you don't think about until you need them, and then you wonder how you ever managed without them. With 55,756 Amazon UK ratings — seriously, go check — they're the undisputed king of humidity control. The science is simple: a saturated salt solution inside the pack absorbs moisture when it's too humid and releases it when it's too dry, automatically maintaining a perfect 62% relative humidity.
Why 62% is the Magic Number
Below 55% RH and your terpenes start degrading, your herb gets dry and harsh, and it crumbles to dust when you try to grind it. Above 65% and you're inviting mould to the party. The 62% sweet spot keeps your herb supple, preserves all those delicate flavour compounds, and maintains that perfect 'sticky' texture that makes for the best smoking experience. It's not a gimmick — it's genuinely transformative for long-term storage.
How Long Do They Last?
In a properly sealed jar, a single Boveda pack maintains humidity for 2–4 months. You'll know it's done when the pack goes rigid and loses its flexibility. At £17.99 for 10 packs, the ongoing cost is minimal for the quality of storage it provides. One pack handles up to 28g in a 500ml–1L jar. For bigger stashes, use two.