Boveda 2-Way Humidity System
From our friends at Vermont Violins, Boveda's 2-way humidity control technology automatically protects your wooden instrument against warping, cracks and other damage caused by lack of humidification or too much humidification. Boveda maintains a constant 40%-50% relative humidity level within your instrument's (closed) case.
Improper storage is the greatest constant danger to the condition of a wooden instrument. Until Boveda, humidified storage meant refilling awkward and unreliable sponges, snakes or discs. Those products only work 1-way, they add humidity whether it's needed or not, while Boveda is the world's first 2-way humidity control.
Includes: 4 large 70 gram Boveda packs and 2 leak-resistant fabric holders.