Hemp / Nylon pouch filled with bamboo activated carbon material for odor absorption. 3" L x 3" W x 1"H. Estimated life expectancy is 1 to 2 years, depending on what you're storing and how you're storing it. Can be regenerated 2 to 3 times by heating in the sun, using a blow-dryer or in a clothes dryer. Turns any bag into a discreet smell-free bag.