Fred�s Howligans odor absorber reduces stinky smells and looks cute just hanging around. Filled with eco-friendly charcoal, this clever cat absorbs odors and can be recharged monthly in the sun. Works purr-fectly by the litter box but also in your car, closet, gym bag, and more! The outer bag measures 3.5� x 6.25� x 1.75, is made of linen and holds 4.2oz of bamboo charcoal.