Boveda Pouch Holder 1pc 49% RH Moisture Regulator Pouch Holder 1 Pack

Boveda for Music | Double-Sleeve Fabric Holder for 49% RH Boveda 2-Way Humidity Control | For Use with 2 Boveda Size 70 to Protect Large Instruments from Cracking/Warping

Boveda 49% Two-Way Humidity Control Packs for Music Instruments – 4 Pack – Standard Size – Prevents Warping & Cracking for Wooden Instruments– Humidifier Packs for Instrument Cases – Resealable Bag