Boveda 49% Two-Way Humidity Control Packs for Music Instruments – 4 Pack – Standard Size – Prevents Warping & Cracking for Wooden Instruments– Humidifier Packs for Instrument Cases – Resealable Bag

Those who own sensitive acoustic guitars that need PROPER HUMIDITY KEPT, will want these. I used to use the sponge humidifiers, but that caused my Takamine 12 string to over humidify and swell at the bridge. Since these do both humidify and dehumidify, they actually fixed my swelling issue with my 12 string! My Martin would suck up all the water in the sponge humidifier within a week during the winter months. These last a month or two for me before I need to change them for new ones. I think the 12 pack is a great value and these packets are a must have for my acoustic guitars. Nake humidity maintenance so much easier.

I put these inside my Ukulele soft carry cases. I have to put two in each case to keep the humidity at about 45%. These work better than other methods I have tried for maintaining correct humidity inside the cases. My Ukuleles are solid woods of Koa or Acacia and it is important to keep the humidity at the proper level to prevent cracking of the woods.

If you have a wooden instrument that you store in a case, just use it. These are great. We travel to areas with wildly different humidity and these keep the mandolins, guitars and fiddles happy!

A elegant solution to an age old problem. Leakproof and basically foolproof as long as you remember to replace every 90 days! Thank you again Boveda for another fine product!

Good system for providing moisture

Great necessity for owning acoustic guitars! Works like a charm to keep those babies working perfectly, easy to use, fits perfectly in any case or in the sound hole, and a great value.

I have been using the Boveda 49% Humidity Packs for years in all of my acoustic and electric guitars. They are super easy to use. There is no muss, no fuss as the gel liquid is in sealed the packets. I live in the NE so with the heat on in the winter it can be very dry (low humidity) and without a/c the summers get pretty sticky (high humidity). These packs do a pretty good job regulating the humidity in the case. I use the Boveda Double holders which holds two humidity packs and put one double holder over the strings and hang it into the sound hole of my acoustics and one double holder with two packs under the headstock. The inside of the case stays between 45% and 55% which is ideal. I do the same for my electrics but I only use one double under the headstock. I found this is enough to keep the fretboard hydrated and prevent fret sprout. I find that I am getting 8-12 months of use out of the packs using them the way I do once they are opened. I buy in bulk and store the unused, unopened packets in heavy duty zip lock bags. Never had a problem doing this even if they are stored for a year.

This brand is the best I've used. Lasts long and works well.

Funcionan en el clima seco de madrid tal y como describe el fabricante. En los momento de más sequedad atmosférica (20%+), en una guitarra que estaba una funda no rigida, he metido 2 dobles fundas (4 bóvedas), pero era de esperar. También subrayo que duran mucho: de momento, y en estas condiciones, han pasado meses y ayer acabo de notar los primeros cristales 'duros'.

👌

indispansable pour conserver les anches à la bonne hygrométrie

It is very good for my guitar

i originally got these to prevent the neck warping on my acoustic guitars due to seasonal changes. it used to be frustrating to fool with the truss rod every 15-20 days. tried putting this in my hard case as recommended and wow - yes, the neck warping reduced by 80%. I only need to make minor tweaks to the truss rod once in 3 months. But what is even more important : I own 4 luthier built acoustic guitars and each of them sounds extra-ordinary - but only on few days of the year when the weather is ideal ! but now with these humidifiers, these guitars sing at their best every day of the year. keeping ~50% humidity in the case keeps the wood from sounding dry/raspy in summer and from sounding like it has a blocked sinus in rainy season. i think these humidifers are an excellent product to have your precious guitar sounding their best always. u also dont need to waste time on monitoring with a humidifier and add/take out few of the packs, like with other products. these seem to maintain the humidity within a decent range most of the time. yes, buying so many packs a year for 4 guitars quickly adds up to a significant amount of money. but i am not complaining too much about the price of the humidifier packs as it's a good quality,unique product. the only thing i am not happy about is the price of the pack holders. god, these things are just square pieces of cotton and they are sold for obscene prices of Rs 1,500 each ! seriously ? i need 2 of them for each hard case and that for 4 gtrs, just the fabric holder runs upto Rs 12,000. boveda should profit from selling their humidifier and not from fleecing us for tiny pieces of fabric. otherwise, i am happy with this product.