HUMI-SMART 2-Way Humidity Control for up to 25 cigars. HUMI-SMART 2-way humidity control packs to control moisture in an enclosed area. Our technology will either release or absorb moisture, maintaining relative humidity at 69% in a contained environment. We include a smart, simple-to-read to replacement indicator card with our HUMI-SMART packs. Simply replace the old pack with a fresh one when the dot on the replacement indicator card turns from pink to blue.