Guitar Dehumidifier Bag Set w/Bamboo Charcoal (3-50 g)

Dropped humidity in my cases from 62% to 45%, and they recharge in the sun! Easy to use, effective, and natural. Unlike silica gel packs, these Ever Bamboo Dehumidifier Bags use natural bamboo charcoal, making them eco-friendly and safe for your precious instruments. Plus, no more worrying about replacing them - just pop them in the sun now and then to recharge! It works!Highly Recommend: If you're looking for a natural, effective, and easy-to-use way to control humidity in your guitar cases, these bamboo bags are a winner! My guitars are happier and healthier than ever, and that's music to my ears!

I tried these in my Martin case, but it had very little effect, and I have a hygrometer in the case. I bought Wisedry packets and they work very well, up to a week. I did place the Everbamboo packs in the sun and added with the Wisedry packets, and there was a couple of percentage drop, so I use together.

Don’t waste your time. Living in the southwest this barely lowers ambient humidity. I have sensors accurate to 1% in each case that log up to 1 year and I’ve noticed that the pack is good for about 2 weeks then it has to be dried in the sun. Once these are even less effective I’ll toss them and either buy bulk desiccant or some packs that I can dehydrate in the oven that do a better job of drying the guitars. Do yourself a favor and keep track and avoid this product.

I used 3 of these in an acoustic guitar case. I didn't notice any difference in hygrometer readings even after the bags were left in the guitar case for 2 months. I guess the good news is that the humidity didn't get any worse, but it didn't get any better either.

Saw several negative reviews but after 4 days I’ve seen a marked difference on my hydrometer so a big thumbs up for me.👍🏼

Good price and performs as expected. It has been consistently keeping my case at 46% RH during high humidity weather. I haven't tried to dry them out in the sun as the instructions suggested. I think I would try the oven instead though.

RH where I live is running ~ 10-15% above top of recommended range for acoustic guitars. I put this product in my case with my guitar & a calibrated hygrometer. It didn't do a thing. Instructions recommended refreshing the bamboo charcoal packets after using them using them for 30-60 days. I had used them for 1 day but decided to refresh them anyway to see if that would get them working, so I put them outside and exposed both sides of each packet to sunlight for 3 hours & tried them again. Again, they didn't do a thing. I wish there was something below 1 star - feels wrong to even give it that.

Did not lower the humidity in my guitar case

Seem to maintain humidity around 60 % inside a guitar case where the room is at 65%

I use for reducing humidity of acoustic guitars. I have tried two-way dehumidifiers before such as boveda and humidipacks but didnt work. This one worked well according to my hygrometers! I'm buying another one for my second guitar.Important to say that I dont think it would work with gig bags as the fabric wouldnt allow the less humid air to stay inside the bag. Make sure you have a good case.

Hard to tell if these actually make a difference with your guitar, they don’t feel very good in terms of material and quality. Would recommend this product.

Avoid these they do not work!!I purchased three packs of these to try out on three guitars. I used a temperature humidity data logger inside the guitar cases to measure any effect.Result........over a period of three days the humidity remained exactly the same with or without them at 61% even when the humidty of the room was controlled down to 50% by a dehumidifier in the room. The case was a hiscox case so there was a good closure all around.I had hopes that when using the guitars at a controlled room humidity, the bamboo charcoal packs would maintain this inside the case but clearly not. My next step is to try larger packs of silica gel which is considerably cheaper to buy and indicates when it is spent through a colour change.My considered opinion is that these bamboo charcoal bags are a gimmick that has not been tried and tested and I know through experiment does not do a thing to help with humidity in the case.

Works well.