BovedaHigh-Absorbency 49% Two-Way Humidity Control Packs for Music Instruments in Extreme Humidity – 12 Pack – Size 40 – Moisture Absorbers for Instrument Cases – Prevent Warp – Individually Wrapped

I own a few violins. Each lives in its own case. I don't trust the humidity gages in the cases. I have seen high humidity destroy these instruments. So a 5$ product to make sure they are properly humidified (each packet averages to about 5$ at time of writing.) is cheap peace of mind. Now - I bought a couple govee temp/humidity sensors - again cheap.Performance - starting at a relative humidity of 40% it took ~2 hours to reach 52% inside of a largeish oblong violin case. All these numbers are +/-3% because the measuring device is +/-3%. The past 12 hours the humidity has not moved - at all. Though the case is being stored in a room with a dehumidifier that reports 55-58% in the past 12 hours. So, in reality, given the range of error on the measuring device it could very well be 49%.So, the packet is pretty accurate, they fit inside all my cases, and they are also easy to open and toss in a case.All in all a very cheap and easy peace of mind for your fiddle (collection). The packets measure within their rated range as far as my instruments can measure.(As an aside, I use the large 49%, I never tried the small ones rated for violins. But the price difference between small and large isn't worth a suspected more frequent replacement. And I bought my first set from my local strings shop.)

I used these products for my guitars and basses. Every instrument gets a two-pack of these humidity monitors in its hard shell case. I have many fine instruments and I rely on Boveda to protect them from the ravages of humidity and dryness year round. In an area with humid summers and dry winters, Boveda is a simple answer to the complex problem of managing humidity to protect expensive instruments.

Doesnt work. Plain and simple. Emailed company support which said “takes up to 2 weeks to balance humidity at 49%”. Been a month now and same exact 70% as I started out at before adding this waste of money. Even tried doubling up of the karge high absorbency packs. Nada. Dont buy (at least not for musical instruments)

I’ve used these humidifier packs for my guitars for about 8 years. My recent order of 12 packets is NOT the same as previous orders. These packets of 49% humidifier packs are EXTREMELY thin. About half the depth, or squishyness of previous orders. At first I thought the packs leaked , but not so.Plus- for the second time in a row the shipping box came in a big envelope, which was broken and squashed in transit.Very disappointing

Just disappointed