The D'Addario Planet Waves Small Instrument Humidifier is designed to protect your small woodwind and string instruments from the damaging effects of low humidity. This easy-to-use humidifier is perfect for maintaining optimal moisture levels inside your instrument case, preventing cracks, warping, and other humidity-related issues. Its compact size ensures it fits in most cases, while the sponge system allows for controlled and consistent humidity release. Ideal for both beginners and professionals, the D'Addario Planet Waves Small Instrument Humidifier is a must-have accessory to ensure your instrument stays in top condition, especially during dry seasons or travel.