Boveda 1g 62% Square Humidity Control Packs, 1,500 Count
Each 1 g square pack holds up to an eighth, or 3.5 g, at 62% RH. Pure water vapor crosses a reverse-osmosis membrane in both directions, so a tube that dries out recovers. Square format sits flat against a lid or in the base of a jar. The comparison that matters is against the slim version of the same 1 g pack. Same weight, same fill, same setpoint, and only the outline differs. Square suits anything with a round or wide footprint, and slim suits a narrow pre-roll tube. Boveda's fill is food-grade salt, purified water and a thickening agent, a different chemistry from Integra's salt-free glycerin. Both hold a number, and they get there differently.
The Square Format for Tubes and Small Jars
At 1,500 per case this is the format for packaging lines. The square shape is the one for tubes and small jars with a round or wide footprint. The slim rectangle version fits narrow pre-roll tubes where a square will not lie flat. Boveda's own figure is 15% higher weight retention against product stored without it. Nothing to activate. The packs are live on arrival, which is also where the limit of this configuration shows. An opened case works against the room until it is resealed. And a 1 g pack has no useful margin above an eighth, so anything larger wants the 4 g or the 8 g instead. Those carry margin to spare.
Key Features
- 62% Two-Way Control: Adds moisture to a container that has dried out and pulls it back when the lid comes off.
- Holds Up To 3.5 g (1/8 oz): Matched to single-eighth tubes and small jars rather than full ounce containers.
- Square Format: Lies flat under a lid or in a jar base without canting across the diameter.
- Pure Water Vapor Only: A reverse-osmosis membrane means nothing but water crosses into your material.
- Food-Grade Fill: Salt, purified water and a food-grade thickener, safe resting directly against contents.
- 1,500 Packs per Case: Packaging-line volume, priced for continuous fill rather than single jars.
- No Activation Required: Active on arrival, so there is no soaking, charging or maintenance step.
- Tactile Replacement Signal: The pack turns rigid when spent, so no indicator card is needed.
Technical Specifications
| Specification | Value |
|---|---|
| Pack Size | 1 g (Size 1) |
| Relative Humidity | 62% |
| Shape | Square |
| Protects | Up to 1/8 oz (3.5 g) |
| Case Quantity | 1,500 packs |
| Technology | Patented 2-way humidity control (adds and removes moisture) |
| Composition | Food-grade salt, purified water and a food-grade thickening agent |
| Membrane | Reverse-osmosis membrane — releases pure water vapor only |
| RH Accuracy | ±2% of labeled RH in an airtight container |
| Direct Contact | Safe against stored material; will not damage contents |
| Shelf Life | 2 years unopened |
| In-Use Life | 2–4 months; replace on a ~3 month cycle |
| End-of-Life Indicator | Pack turns rigid when spent |
| Activation | None — active on arrival, no soaking or charging |
| Equilibration Time | 24–48 hours to reach target RH in a sealed container |
| Manufacturer | Boveda Inc. |
| SKU | MB62-01 |
How Much Does a 1g Boveda Hold?
Up to an eighth, or 3.5 g. The 4 g covers a half ounce, the 8 g a full ounce.
Square or Slim — Which 1g Should You Use?
Square lies flat in jars and wider tubes. Slim is a rectangle built for narrow pre-roll tubes where a square will not sit properly.
How Long Do 1g Boveda Packs Last?
Two to four months in a sealed tube, on a roughly three-month replacement cycle. Unopened shelf life runs two years.
Do These Need Activating Before Use?
No. They arrive active with no soaking or charging, and reach target RH within 24 to 48 hours in a sealed container.