I dropped this on Guy journal last night. I think it's the best explanation I've done so far on the bags.
Turkey roasting bags.
If you product is dry then just put it in the bags with a hygrometer to keep an eye on your moisture and start out burping twice a day for a few days then once a day for a few and so on. I like my product too be just a bit moist (in the upper 60's) after drying and I burp in my ac house at around 50% rh. This will bring in fresh air that is not as moist as the product and will bring the rh down slowly in the bags. If in the first day it's 70% or above I'll dry it a day or 2 more then start the cure again. If it's low on moisture I'll take it outside in the middle of the night to burp them as the humidity is usually about 85-90% then and will rehydrate them slowly.
The great thing about the bags is it's quick and easier to keep the moisture where you want it. Example if I'm reading 68% I will take the bag and just flap the opening 2-3 times to expel the air and replenish it with fresh air. I also will leave more air in the bag at this point to help lower my rh. Once it get to like 64% then I'll only leave enough air to cover the product because I'm not needing my rh to come down much further. Same on the other end. If I have my rh drop into the 50's I'll leave more of my humid air in there to help rehydrate.
If you have cured in jars you know you have to leave them open for 5-10 min. To breath but with the bags it takes 5-10 seconds. Just lift the opening up and down like bellows. And if your product is sticking to the jar you need to bump it around and fluff things up so it's not sticking or things can get moldy. With the bag you just roll it back and forth a few times and things just fall apart.
Hope I explained that ok if not just do a shout out or come by my journal and ask. I feel with the bags i have the most control and I had some big plants come in and didn't want to be burping 30 1/2 gal jars twice a day.
It's almost like training your cure.