Two-way humidity bags for grow tents?

Are there any two-way humidity bags for grow tents if there are where can I get them?

What is that and whats it use or how its used?

amneziaHaze said:

What is that and whats it use or how its used?

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That’s the question I’m asking I don’t even know if they exist but when it makes sense to have a bag in there instead of having a humidifier or dehumidifier and use up electric

Silica bags basicly the cheapest dehumidifier.you can cook them to recharge