The Boveda Large Kit for Instruments is the perfect solution for managing humidity for wooden instruments such as fretted, bowed, or woodwinds. This kit includes a set of (4) Size 70 Boveda packs with a 49% relative humidity (RH) level, as well as fabric holders for easy placement near the instrument. With Boveda, you can achieve and maintain a constant RH range of 45% to 55%, which is the safe zone for wood instruments. The Boveda packs automatically add or absorb moisture as needed, eliminating the need for foams, hoses, and sponges that can damage the instrument and lead to costly repairs. Each Boveda pack provides humidity control for 2 to 6 months, ensuring long-lasting protection for your wooden instrument.