Boveda Music Small Starter Kit - (1) 49% RH Standard Boveda - Ideal Two-Way Humidty Control for MOST CLIMATES - For Ukulele, Violin, Clarinet & Other Small Wooden Instruments

I use these with my mandolin and they work perfectly. I place one under the headstock and keep one on the top between the bridge and tail piece. The packs last about four months (here in North Central Texas) year round, but I usually change them per the manufacturer's recommendation. They offer great protection for a modest price. I enjoy the hassle-free approach - no water or sponges to care for!

This winter is colder than usual here and my violin has had to deal with temperature and humidity variations. I bought this after arriving at my orchestra rehearsal to find my bow under tension and my e string peg slipped. No mishap since purchasing. It did force me to keep my violin in its case rather than on the stand in order to enjoy the benefits — but having my violin stay in tune session to session is pretty amazing. All my violin and guitar cases now have one!

I use these packets for my ukeleles and other small wooden instruments. They control the humidity so the wood doesn't buckle or crack. I doesn't add humidity (like a humidifier), rather it moderates the level of the humidity available to keep it stable in most climates. I use the ones made for a steady 49% humidity and I'm very pleased so far.

They last longer than it states on the package. Easy to use, and helps balance humidity while the instrument is in it's case. I wish I could find refills instead of having to buy holder as well.

Most useful

Never increased the internal humidity in my guitar case at all. Returned.

I put two size 70 pads in my ukulele hard case and I managed to get the humidity up to 35% in addition to having a whole house humidifier. This is nowhere near the 49%. I suppose I could add another pad in the case but at the price point, I decided to add a humilele sponge humidifier to the sound hole and that got me to 41% which is acceptable. I think these can be effective but I would double the recommended amounts.

I was using the "wet sponge" holders for my ukuleles and when I saw these I thought, "Oh good, no more wetting sponges." I bought the pack designed for small instruments/ukuleles, followed the instructions and after a few days the hygrometer in my cases indicated things were drying out instead of holding steady after the sponge was taken out. So I'm back to wetting sponges but I also have protected my instruments. It might be I live in a very dry climate (Colorado) and it's very hard to get ahead with the humidity. Either way I need something dependable.