D'AddarioAccessories Guitar Humidifier Packs - Two-Way Humidification System Conditioning Packets - For Maintaining Proper Guitar Humidification Level - 3 Maintain Replacement Packets

If you have a guitar, you need to keep it properly humidified. These packs are great and work like a charm. The only time they've failed to maintain the internal humidity in a guitar case to within +/- 1% of their labeled value was when I put them in a case that had a really bad air gap when closed...definitely not the fault of the pack, it was competing with the outside air and still managed to get the internal humidity to within 5% of the value. These refill packs last a while and are great if you have multiple guitars to humidify.

I’ve used these for the past 10 years! Never had an issue with them and they do a great job of keeping the wood of my guitar just right.They are very easy to use and for the money, I don’t think you can go wrong!Only thing I’d recommend is that you keep your guitar in a hard shell case when using these.

These have saved my instruments through many winters and humid summers. Absolutely can’t recommend these enough! When they get crunchy in the winter, I replace them with a fresh one. Haven’t had to setup any of my acoustics since using these.

The courier in a budget rental. The product was fine left on my porch but he also opened my garage door and then just left. But couldn’t tell Amazon in their problem report because this was the only space to complain. So hopefully someone that reads this product review will pass this info off to someone at Amazon. Product is just fine.LB

A guitar needs a distinct level of humidity to play well, and to stay in tune, in wet weather or dry. Aside from keeping the best tones, humidity is needed to keep the wood stable. A dry guitar will give you cracks and splits, and costly repairs. You can buy a number of costly devices, but the guitar string makers, D’Addario, having given us these bags of a moist substance that do the same thing. If the climate is humid, so is the guitar. In atmospheres that make the tone woods dry, the humidity is absorbed by the wood. I started just to try. A week later, in winter, I could feel and hear the humidity rise. The sound was better, and also easier to play. I am convinced, now, that it has made my treasured guitar remain in good shape for a long time. Once you try, you may do what I did, ask Amazon to send you four different packages in a year. Near the end of one set of moist bags, you feel them being brittle. The next $18 moist bags arrive on time, and the proper moisturizing continues.

I live in the Northeast where the weather can get really dry. These keep my guitars safe by producing just the right amount of humidity inside of the guitar case.

Excellent product

Anybody who has a nice acoustic guitar knows it's a delicate thing, made of natural wood. If you don't humidify that wood, it will crack, ruining the guitar or necessitating expensive repairs. The Daddario Humidifier Packs I've used are amazing, easy, and effective. They last about 6 months and AUTOMATICALLY keep your guitar (if stored inside its case) at an ideal 45% humidity level. Just put one of the 3 packs that come in the box under the headstock of your guitar; and hang the other two -- like a saddle on the back of a horse -- over the strings. That's it. I like this humidifying solution MUCH more than the 'sponge' or 'soundhole' humidifiers, which -- even when inserted properly -- stretch your strings to the side to make room, and are sometimes prone to spilling water. I love my Gibson guitar, and I love knowing it has plenty of humidity in the case.