G'day legend,

In the early 1990s, a woodworker named David was building some of the finest wooden humidors in America. Beautiful boxes. Precision joinery. Spanish cedar lining that smelled like money. There was just one problem that was driving him absolutely mad.

He couldn't keep the humidity stable inside them.

Sponges dried out. Distilled water needed constant topping up. Propylene glycol solutions were messy, unpredictable, and required more attention than most cigar lovers were willing to give. David was building world-class humidors and every single one of them had the same fundamental flaw: nobody had properly solved the humidity problem.

So, he called a friend.

Dr. Albert Saari was a retired General Mills chemist who'd spent his career in the Betty Crocker division working on food preservation and moisture control. Multi-award-winning patent holder. The kind of scientist who understood at a molecular level what salt and water do to the air around them. Dr. Saari looked at the problem and recognised the solution immediately: different combinations of natural salts and purified water create fixed, predictable humidity levels. Supersaturate the right salt with pure water and it holds a specific RH level with remarkable precision.

He called his General Mills packaging colleague Robert Esse, who figured out how to seal the solution inside a membrane that let water vapour pass through but held the salt and liquid safely inside.

The company they formed was originally called Humidi-Pak. In 2012 they rebranded as Boveda - Spanish for vault. Today Boveda ships millions of packs annually to protect cigars, wooden instruments, and cannabis across more than 50 countries.

All of it started because a humidor maker couldn't keep his cigars properly humidified and called a Betty Crocker chemist for help.

That's the science behind the little brown packet sitting in your humidor right now. And once you understand the science, choosing the right pack size and the right RH level for your specific setup becomes a lot less confusing. Let's get into it.

TL;DR - Quick Answer

• Boveda humidity packs and humidification pouches are the same product; the terms are interchangeable throughout this post.
• Pack size determines how much humidification capacity a pack provides. Size 8 suits travel cases, Size 60 suits desktop humidors, and Size 320 suits large cabinet setups.
• RH level determines the precise humidity target the pack maintains inside your humidor. B65, B69, B72, and B75 are the four cigar-specific RH levels available.
• B69 is the universal default for most Australian setups. B65 suits coastal cities with higher ambient humidity. B72 suits dry inland areas and drafty humidors.
• You can never use too many Boveda packs. The two-way chemistry stops adding moisture the moment it hits the target RH regardless of how many packs are present.
• RH level is partly science and partly personal preference. There is no strictly wrong choice within the 65% to 72% range — only choices that suit your climate, your humidor, and how you like your cigars to smoke.

What Are the Different Boveda Humidity Pack Sizes and What Are They Designed For?

Before getting into which RH level is right for your setup, it's worth understanding what pack size actually means and why it matters independently of the RH question.

Pack size refers to the physical size of the Boveda pack and the humidification capacity it provides. A larger pack contains more of the saturated salt solution, which means it can maintain the correct RH across a larger volume of air and a larger number of cigars for longer before it depletes. The RH level printed on the pack is separate from the size - a Size 8 and a Size 60 both come in B69, they just serve different storage volumes.

Size 8 is the travel pack. Designed for small cigar cases, travel humidors, and desktop setups holding up to 5 cigars. If you're a weekend traveller who takes a couple of sticks away or you keep a small rotation of three to five cigars on your desk, Size 8 is the right call. Compact, precise, and completely self-managing wherever you take it.

Size 60 is the everyday workhorse. The most commonly used Boveda for home cigar storage across Australia. One Size 60 pack covers every 25 cigars of total humidor capacity. A 50-count desktop humidor needs two packs. A 75-count needs three. A 100-count needs four. Always size to the humidor's total capacity, not the number of cigars currently sitting in it.

Size 320 is built for serious collectors. Cabinet humidors, wineadors, coolerdors, and any large-volume cigar storage setup. One Size 320 covers every 100 cigars of total capacity. If you're running a 500-count wineador, that's five Size 320 packs distributed evenly across the shelves.

One rule worth burning into memory: you can never use too many Boveda packs. The two-way chemistry stops adding moisture the moment it hits the target RH, regardless of how many packs are present. More packs means each one works less hard, lasts longer, and provides more stable humidity across the full storage environment. It is never a problem to add an extra pack.

What Is the Difference Between B65, B69, B72, and B75 RH Levels?

This is where the decision gets personal… and this is also where a lot of cigar lovers overthink it. According to Boveda's own published technical data, their two-way humidity control maintains the relative humidity inside a humidor within plus or minus 2% of the target RH level when the recommended number of packs is used. That's not marketing language. It's a measurable performance standard. No sponge, gel, bead, or propylene glycol solution comes close to replicating that level of precision.

What that means practically: when you choose B69, your humidor holds at 69% RH, give or take 2%. When you choose B65, it holds at 65%. The difference between the four RH levels isn't dramatic in absolute terms; we're talking about a spread of 10 percentage points across the full range. But the difference in smoking experience between a cigar stored at 65% and one stored at 72% is real, noticeable, and worth understanding before you choose.

B65 (65% Relative Humidity)
The drier end of the ideal storage range. B65 suits blokes and LOTLs who prefer a slightly drier smoke, one that burns more easily, produces a cleaner draw, and delivers a crisper flavour profile than a cigar stored at higher humidity. It's also the preferred RH level for long-term aging of premium cigars; slightly drier conditions slow the development of tobacco oils and allow for deeper, more gradual complexity over months and years. For Australian cigar lovers in coastal cities like Sydney, Brisbane, and Melbourne where ambient humidity already runs higher, B65 provides an important buffer against over-humidification.

B69 (69% Relative Humidity)
The universal default. B69 is the most popular Boveda RH level for cigar storage worldwide and the right starting point for the vast majority of Australian setups regardless of location, humidor type, or experience level. It works across wooden desktop humidors, acrylic humidors, tupperdors, coolerdors, wineadors, and humidor bags. If you're new to Boveda and not sure where to start, start here. You can always adjust once you've smoked a few cigars from your humidor and developed a sense of whether you'd prefer things slightly drier or slightly more humid.

B72 (72% Relative Humidity)
Built for dry conditions and drafty humidors. If you're in a dry inland area (think Perth in summer with the air-con running flat out, Alice Springs, Broken Hill, or anywhere the ambient air is genuinely arid) B72 gives your packs the extra capacity needed to maintain stable humidity where the environment is fighting against them. B72 is also the right call for wooden humidors with lids that don't seal perfectly, where ambient air is constantly exchanging with the interior. It compensates for the additional moisture loss that a drafty humidor experiences throughout the day.

B75 (75% Relative Humidity)
Strictly for extreme dry conditions only. B75 should never be used in an airtight container, a tupperdor, or a Boveda humidor bag. It's designed to overcompensate in extreme ambient dryness and bring the interior RH to a safe storage level. Most Australian cigar lovers will never need B75 in regular use. If you think you do, check your humidor seal first; a leaking lid is more likely the culprit than an ambient environment that genuinely requires B75.

How Do I Know Which RH Level Suits My Australian Climate and Location?

Australia's climate is one of the most varied in the world for cigar storage purposes. The same country that produces tropical monsoon humidity in Darwin produces bone-dry desert heat in the interior and a relatively mild, temperate climate along the southern coast. Getting the RH level right for your specific location makes a genuine difference to how consistently your humidor performs across the seasons.

Here's the honest Australian climate guide:

Coastal Queensland and the Northern Territory (Brisbane, Cairns, Darwin): High ambient humidity for much of the year. B65 is the smart choice to prevent over-humidification during the wet season. If you're running a well-sealed humidor in a climate-controlled room, B69 may work year-round, but keep an eye on whether your hygrometer reads consistently above your target RH, which signals that B65 would serve you better.

Sydney and Melbourne: Both cities sit in the mild-to-moderate ambient humidity range. B69 is the right default for most setups. In the height of summer when humidity climbs or in winter when heating dries the air significantly, B69's two-way control handles both extremes without you needing to switch RH levels.

Perth and the dry inland (Adelaide Hills in summer, regional WA, SA, and NT interior): B72 earns its place here. Perth's summers combined with air-conditioning create genuinely challenging conditions for cigar storage. The ambient air is dry enough that B69 packs work noticeably harder and deplete faster than in more temperate environments. B72 provides the extra headroom needed to maintain stable humidity where the environment is actively working against your setup.

High altitude and alpine areas: Temperature variation rather than humidity is the primary challenge in alpine Australian environments. B69 suits most high-altitude setups - the key is temperature stability rather than RH level adjustment. Keep your humidor away from heating and cooling vents and let Boveda handle the humidity side.

You can read the full Boveda origin story and the science behind why the saturated salt solution approach works better than any alternative at Boveda's official story page. Worth five minutes of your time, mate.

Is There a Wrong RH Level for Storing Cigars, or Does It Come Down to Preference?

Here's something that doesn't get said enough in cigar storage guides: within the 65% to 72% RH range, there is no strictly wrong answer. There's a science-backed optimal range. But within that range, personal preference plays a genuinely significant role in which RH level delivers the best smoking experience for you specifically.

Managing the right humidity in your home humidor is a little bit of art combined with science.

Some cigar lovers find that their smokes draw too easily and burn too quickly at 72%; a sign that slightly drier conditions (B65 or B69) would suit their preference better. Others find that their cigars at 65% require more effort to light and feel slightly tight on the draw; a sign that a step up to B69 or B72 would improve their experience. Neither group is storing their cigars incorrectly. They're discovering what works for their palate, their collection, and their smoking habits.

The practical approach is to start with B69, smoke a handful of cigars from your humidor over two to three weeks, and pay attention to how they draw, burn, and taste. If they're consistently drawing too tight or burning hot, try moving to B65. If they feel slightly resistant on the draw or the wrapper feels unusually firm, try B72. The two-way precision of Boveda means you can make this adjustment by simply swapping the packs - no other changes to your setup required.

One thing that must not be done: mixing RH levels in the same humidor. Pick one and commit to it. Two packs at different RH levels fighting each other in the same enclosed environment produce neither target RH reliably. Choose your level, use the right number of packs for your humidor's total capacity, and let the chemistry do its job.

Can I Use Multiple Boveda Packs in the Same Humidor and Does It Matter How Many?

Too right you can, and it matters more than most people think, though not in the way most people worry about.

The number of packs matters because of coverage and longevity, not because of RH accuracy. A single Size 60 pack in a 100-count humidor will technically maintain the correct RH for a while. But it's working far harder than it needs to, depleting faster than it should, and potentially creating uneven humidity distribution across the full interior of the humidor - particularly if the single pack is positioned in one corner while cigars at the opposite end of the box receive less direct humidity regulation.

Two Size 60 packs in a 100-count humidor share the workload. Each one depletes at roughly half the rate. The humidity is distributed more evenly across the full interior. And the overall stability of the environment inside the humidor is noticeably better than a single pack trying to do the same job alone.

A useful way to think about it: Boveda packs aren't like medication where more than the recommended dose causes problems. They're more like air conditioning units in a large space - multiple units working together at moderate capacity produce better, more even results than one unit running at maximum. The chemistry stops adding moisture at the target RH regardless of how many packs are present. There is no such thing as over-packing your humidor with Boveda.

How Long Do Boveda Packs Last and How Do I Know When to Replace Them?

Boveda recommends replacing packs approximately every three months in a standard wooden desktop humidor. In practice, the lifespan varies depending on how dry your ambient environment is, how often you open the humidor, and how well your humidor is sealed.

In genuinely dry conditions (a Perth home in summer, a drafty wooden humidor, or a humidor that gets opened frequently) packs may deplete faster than the three-month mark. In a well-sealed tupperdor or coolerdor in a temperate climate, the same pack can last significantly longer. Some collectors report six months or more from a single pack in an airtight setup.

The replacement signal is simple and requires no hygrometer, no monitoring, and no guesswork. When a Boveda pack goes hard and rigid (when it feels like a flat, solid tablet rather than the soft, pliable pouch it started as) it's depleted and needs replacing. The moisture has been fully absorbed into the environment and the pack has nothing left to give.

Never attempt to rehydrate a spent pack with distilled water. Boveda is explicit on this: a rehydrated pack cannot maintain a precise RH level, produces humidity swings, and risks introducing contaminants into your cigars. When it's hard, replace it. That's the complete maintenance requirement.

Can I Use Boveda Packs in Any Type of Cigar Storage?

Too right. Boveda humidification pouches work reliably across every common cigar storage type going around. Here's how they perform across the main options:

Wooden desktop humidors are where most Australian collectors start and where the Size 60 earns its place as the everyday workhorse. Wood breathes more than airtight alternatives, so packs work slightly harder and deplete a little faster, but the two-way control handles seasonal humidity shifts automatically. B69 or B72 depending on your climate and seal quality.

Tupperdors and coolerdors are actually ideal Boveda environments. The airtight seal means packs work significantly less hard, last noticeably longer, and hold an even more stable RH than in a wooden humidor. B69 is the right call for most tupperdor setups. If you haven't tried a tupperdor, mate, it's one of the best-value cigar storage options available.

Wineadors are the serious collector's weapon of choice. Size 320 packs are built exactly for this large-volume setup. Combine the temperature stability of a wine fridge with Boveda's two-way humidity control and you have one of the finest cigar storage environments available outside a professional walk-in humidor.

Travel humidors and cigar cases are where Size 8 packs earn their keep. Drop one in your travel case and your sticks are protected from the moment you pack them to the moment you light up…  wherever you are across Australia.

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Key Takeaway

A Betty Crocker chemist and a packaging specialist solved the cigar humidity problem in the late 1990s with natural salts, purified water, and a permeable membrane. The result maintains RH within plus or minus 2% of the target level - the most precise passive humidity control available for cigar storage anywhere in the world. Size your packs to your humidor's total capacity using Size 8 for travel, Size 60 for desktop, and Size 320 for larger setups. Start with B69 for most Australian conditions, adjust to B65 for coastal humidity or B72 for dry inland environments. Within the 65% to 72% range, personal preference matters as much as science.

Cigar Humidor Boveda Humidification FAQ

Which Boveda humidity pack size and RH level do I need for my humidor?
Size your pack to your humidor's total capacity: one Size 8 per 5-cigar capacity for travel cases, one Size 60 per 25-cigar capacity for desktop humidors, and one Size 320 per 100-cigar capacity for larger setups. For RH level, B69 is the universal default for most Australian conditions. B65 suits coastal cities with higher ambient humidity. B72 suits dry inland areas, drafty humidors, and low-humidity air-con environments common in Perth and other dry climate cities. You can never use too many packs. Boveda stops adding moisture once the target RH is reached.

What is the difference between B65, B69, B72, and B75?
Each number represents the precise relative humidity level the pack maintains inside your humidor. B65 delivers a slightly drier storage environment suited to coastal Australian climates and long-term aging. B69 is the universal default recommended for most setups worldwide. B72 provides extra humidification capacity for dry inland environments and drafty humidors. B75 is strictly for extreme dry conditions and should never be used in airtight containers or humidor bags. Within the 65% to 72% range, personal smoking preference also plays a role in which level suits you best.

Is there a wrong RH level for storing cigars?
Within the 65% to 72% range, there is no strictly wrong answer. The ideal storage range is science-backed, but which specific RH level within that range delivers the best experience is partly personal preference. Some cigar lovers prefer the slightly drier smoke and easier burn of B65. Others prefer the fuller, more humid character of B72. Start with B69, smoke a few cigars over two to three weeks, and adjust based on how your sticks draw, burn, and taste. Never mix RH levels in the same humidor.

How long do Boveda packs last and when should I replace them?
Boveda recommends replacing packs approximately every three months in a standard wooden desktop humidor. In drier conditions or frequently opened humidors, packs may deplete sooner. In well-sealed tupperdors and coolerdors, packs can last six months or longer. The replacement signal is simple: when the pack goes hard and rigid rather than soft and pliable, it's done. Never attempt to rehydrate a spent pack. Replace it with a fresh one.

Can I use Boveda packs in any type of cigar storage?
Yes. Boveda humidification pouches work reliably across wooden desktop humidors, tupperdors, coolerdors, wineadors, travel humidors, and cigar cases. The appropriate pack size varies by storage volume: Size 8 for travel cases, Size 60 for desktop humidors, Size 320 for larger cabinet setups. The two-way humidity control technology performs reliably across all of them, though packs last longer in airtight containers than in wooden humidors where the wood itself breathes and exchanges moisture with the surrounding air.

The Bottom Line on Boveda Pack Sizes and RH Levels

David the humidor maker called Dr. Albert Saari because sponges and distilled water weren't good enough for the cigars he loved. Dr. Saari solved the problem with chemistry that a food scientist from the Betty Crocker division understood better than anyone. Robert Esse sealed it in a membrane. And the cigar world changed.

The little brown pack in your humidor is the product of a retired chemist's curiosity and a packaging specialist's ingenuity. It maintains plus or minus 2% RH without any effort from you. All it needs is the right size for your storage volume and the right RH level for your climate and preference.

Size 8 for travel. Size 60 for home. Size 320 for serious collections. B69 to start. B65 for coastal humidity. B72 for dry conditions. Personal preference within the 65% to 72% range. That's the complete decision framework. Everything else takes care of itself.

Managing the right humidity in your home humidor is a little bit of art combined with science. If you're unsure which combination is right for your setup, reach out the team on 08 9217 0288 or emal me joe@cigarbox.com.au. If you're a guru at nmainatinaing your humidor using Boveda packs, check out every pack size and RH level that best suits your needs and Australian conditions right here at CigarBox.

Till next time, LOTLs,

Joe Box | Your Brother of The Leaf 🍂

PS:  Now that your humidity is sorted, mate, the next question every serious cigar lover needs to answer is: what do you actually do when your cigars arrive? Opening the box, inspecting the sticks, letting them rest, and getting them into your humidor properly makes more difference to your first smoke than most people realise...

PPS: Next time we're walking through exactly what to do after you buy cigars online - from the moment the box lands at your door to the moment you light up your first one properly. If you've ever wondered why a cigar you ordered online didn't smoke quite as well as expected, this one's going to answer that question. Catchya next week CigarBox family legend....