Boveda 49% Two-Way Humidity Control Packs for Music – Single Standard Size – For Wooden Instrument Cases – Humidifier Pack Prevents Cracking & Warping – Individually Wrapped Guitar Humidifiers

A guitar technician turned me onto this product and I don’t regret it. This is a perfect way to keep my expensive guitars at the right humidity level. I bought the little cloth bag to suspend it over and around my strings and into the sound box. Works great.

My violin teacher recommended this highly. The idea is to maintain a consistent humidity level inside a violin case (or other instrument) regardless of seasonal changes, etc.

Exactly as described; works well and is helping control the humidity properly for my partners viola. He’s happy, I’m happy!

I’m glad😁

Good quality product. Keeps those axes from getting parched.

I have been using these packets to maintain humidity for my wooden instruments for over 8 years now. They are the easiest and cleanest way to keep the humidity level up especially in our harsh Buffalo winters where our humidity indoors can be below 20%. Unlike other methods there is never a worry for the development of mold or mildew. They are also good at keeping humidity down in the summer however I do not find them to be as efficient doing so. When measured with several humidity gauges I find the packets to be within 10% of the numbers on the packets.Interesting note, the instructions state to discard when they become dry, however I have rejuvinated all of my dried packets by placing them in ziploc freezer bags with a drenched sponge. Over a day or so they will soften back up and work as well as when I first bought them.

I was skeptical about whether the Boveda humidifier system would actually work given all the choices out there for keeping musical instruments in a properly humidified environment....49% Rh, give or take 5%. I purchased one #70 sized packet and one of the Boveda fabric cases, which I thought was a bit pricey at $9.99. The plastic packet containing the liquid gel material sits in the fabric holder in the guitar case, which needs to be closed tight. After day 1 there was no change on the hygrometer in the case with the Boveda system, as was the result for another guitar/case without the Boveda system. Both were showing around 43% humidity. Days 2 and 3 showed the same results for both cases, hmmmm. On day 4 there was about a 2% difference between the two cases, with the "Boveda" case showing the higher humidity level. After a week the "Boveda" case got up to 48% Rh while the other case hovered around 43-44% Rh...not bad for an unhumidified (?) case. I live in SE Pennsylvania so there is a wide difference in humidity from winter to summer. This test was done in December when outside temps were between 25-40 degrees F and indoor humidity was about 36%. In extremely cold or hot humid environments I believe more humidipacks would be necessary per case to maintain 45-55% Rh. However, it seems to me that the Boveda system does work given a few days to adjust within the instrument case, and with the lid properly closed.

I purchased these for my vintage Martin acoustic. First, I calibrated my hygrometer, which is an expensive Bluetooth model, which I can monitor them inside my case when I’m away. Next I put desiccant packs in my case with the guitar inside to bring the humidity down as close as I could to 49%. I was able to achieve 52% and then I installed three of the packs inside the Guitar and closed the case. Not long after I closed the case the humidity began to slowly creep up from 52% to 55 then 56%. It appears that these things release humidity more than they absorb it, at least in my experience. For the price I expected these things to lower my humidity to very close to 49% relatively quickly but that’s not what I’m seeing so I’m probably gonna end up returning them.