Planet Waves PW-HPRP-03 Humidification Refills are a 3-pack of replacement packets for the D'Addario Two-Way Humidification System (formerly Humidipak). This maintenance free humidity control system preserves a constant 45%-50% relative humidity level within your instrument's case, eliminating all maintenance and guesswork.
Planet Waves PW-HPRP-03 Features:
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3 replacement packs for the D'Addario Humidification System
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Automatic humidity control protects your instrument against warping and cracks
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No more manual adjustments based on seasonal and temperature changes
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Eliminates the guesswork of maintaining your instrument’s proper humidity level
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No water, no drips, no mess
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Custom made by Boveda for D'Addario