Boveda49% Two-Way Humidity Control Replacement Packs for Boveda Starter Kits for Music – 12 Pack – Moisture Absorbers for Instrument Cases – Humidifier Packs – Individually Wrapped Hydration Packets

My 11 year old plays the double bass and her band teacher suggested these for her instrument. We got the start up set and have loved them ever since. We have a case that tells us the humidity in the case and she put her bass in the case after every use. These are keeping the humidity at a perfect % for the bass. By doing this it maintains the wood and prevents any cracking and splitting of the wood. It also maintains the sound it produces.This box should last her the year.

This is a no brainer way to keep your acoustic guitar in perfect condition. Get these along with the sleeves and you won’t regret it. It’s so easy and a no worry way to keep your wooden instruments from cracking or splitting in a too dry or to wet climate. Get these now before it’s to late. ☮️

I have quite a few acoustic guitars these work, not cheap but worth the investment without a doubt!

I throw one of these in each ukulele case and replace as needed. They seem to work great, and I haven't had any leak even with travel by plane, car and rail. I will be buying these again. Filling up the Oasis, or other refillable humidifiers becomes tedious after a while or if you travel for long stretches of time.

These have kept my hand-built guitars in great shape, despite wild humidity swings in the house. Three, placed in different spots on/in the guitar and case does the trick. Unfortunately, Amazon's "throw it in a bag" packaging meant the Boveda storage box was destroyed in shipping. Good thing each Boveda is sealed in its own plastic!

Product is superb but I was extremely disssatisfied with Amazon shipping. Amazon used USPS who forwarded it to AZ. I needed a the Boveda in ND so had to go buy some from music store. I specified and expected it delivered to my residence. Totally bad.

As described by the seller

Works well for guitar humidifier.