Replenish Your Boveda Humidifier with Refill Insert

The best humidifier/dehumidifier on the market. Carefully calibrated to offer the best protection for stringed instruments. Once set up in your case, no need to refill or recharge it….it will work on its own to maintain the proper humidity level of 49%. We recommend two per case for cellos, one per case for violin and viola. Do not use insert without the sleeve, sold separately. We find each insert lasts about 1-2 months in Vermont…it will last longer in less extreme climates.