Boveda 320g 58% Humidity Control Packs Hold Five Pounds
The largest pack Boveda makes, one 320 g unit covers up to five pounds at 58% RH. The job is a tote or a large curing vessel that would otherwise need four or five smaller packs scattered through it. One unit does it instead. Moisture crosses a reverse-osmosis membrane both directions, so a tote that has run dry recovers instead of just holding. 58% is the drier of the two flower levels, which is what long holds want. A few points under 62% buys months on the far end of a hold. The fill is food-grade salt, purified water and a thickening agent behind that membrane.
A Five Pound Humidity Pack for Totes and Bulk Storage
At 6.75" x 5" and under an inch thick, it lies flat in the base of a tote or a large curing vessel. It does not take usable depth. Sizing runs off weight, not volume. One pack handles a full five pounds, so most operations run a single unit per container instead of scattering smaller packs. Below five pounds it simply lasts longer between swaps, and above it you add a second rather than hoping. Undersizing shows up as a container that never reaches the number. Replace it when it turns rigid, which is the only maintenance there is. Give a sealed container a day or two to settle before reading the result. For long term storage at bulk scale the 320 g is the only size that makes sense.
Key Features
- 58% Two-Way Control: Adds moisture to a container that has dried out and pulls it back when the lid comes off.
- Protects 5 lb (2.5 kg): The largest capacity Boveda makes, sized for totes and bulk vessels.
- 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.
- No Activation Required: Active on arrival, so there is no soaking, charging or maintenance step.
- 6.75" x 5" Flat Profile: Under an inch thick, so it lies in a tote base without stealing depth.
- Tactile Replacement Signal: The pack turns rigid when spent, so no indicator card is needed.
- Drier Than 62% RH: The right level when material is held long term rather than moving quickly.
Technical Specifications
| Specification | Value |
|---|---|
| Pack Size | 320 g |
| Relative Humidity | 58% |
| Protects | Up to 5 lb (2.5 kg) |
| Pack Dimensions | 6.75" x 5" x 0.82" |
| 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 depending on conditions |
| 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. |
| UPC | 852715006170 |
| SKU | 748378 |
How Much Does a 320g Boveda Hold?
Up to five pounds, the largest capacity Boveda makes. The 67 g covers a pound and the 8 g a single ounce.
Boveda 58% or 62% — Which Is Right?
58% runs drier and protects long holds and denser material. 62% keeps more moisture in for product moving quickly to a customer.
How Long Does a 320g Pack Last?
Two to four months depending on conditions. A sealed tote opened rarely runs longer than one accessed daily for dispensing.
Do You Need More Than One Pack per Tote?
Not under five pounds. Above that, add a second rather than expecting one pack to stretch beyond its rated capacity.