ExHale Co2 6x9x8 Brown/White Media

The Original ExHale® CO₂ Bag provides a steady 24/7 CO₂ supply for up to six months without electricity, heat, or refills. Powered by mycelium within a vented bag, it naturally releases CO₂ through a microporous breather patch, raising levels by up to 500 ppm. Ideal for 4ft x 4ft grow areas, it supports organic production and includes a freshness seal that doubles as a hanger. Made in the USA.