The Boveda Humidification System for Cellar 75% 320 g is a long-lasting humidifier bag, specially designed to maintain the stable humidity level of a cigar humidor. The bag is delivered ready to use: just take it out of its transparent plastic case and place it in the cellar. The Boveda sachet releases only water vapor, and you are thus assured of having no parasitic aromas that would harm your precious cigars. Its large size gives it autonomy six times larger than conventional Boveda bags. The moisture content obtained is extremely stable, with a maximum deviation of 1% from the nominal value of 75%.