It is a humidity control material designed to adjust the humidity to 49%, which is optimal for guitars. High Absorption has higher water absorption than B49. It is the best item for the high humidity environment in Japan.
Humidity control sheet for musical instruments with excellent functions of moisture release, antibacterial, antifungal, deodorant / deodorant. Since it is a fiber sheet type, it does not move easily in the case or bag, and it does not easily damage the instrument body or painted surface. When the moisture capacity reaches extreme saturation, the heart-shaped sensor changes from blue to pink.