Boveda Works Automatically - There's Nothing Else to Add
No more hydrating sponges, hoses, discs, soap dishes or whatever else you’ve tried (and dried out) in the past. Boveda eliminates the hassle of these 1-way humidification methods, which spike humidity when you add water then take a nosedive as the water evaporates.
Each Boveda consists of a specially prepared saturated solution of pure water and natural salts. This saturated solution is contained within a water-vapor permeable "reverse osmosis" membrane. Boveda provides the cleanest and most purified humidity of all other products available on the market today.
Boveda comes in 2 different sizes - A large kit and a small kit. The larger starter kit is best used with Acoustic Guitar & Bass, cello & string Bass, Bassoon & Bass Clarinet instruments. While the small starter kit is best to use with Electric Guitar & Bass, Violin & Viola, Ukulele & Mandolin, Clarinet instruments.