KEEP IT FRESH - Mosa bamboo charcoal naturally absorbs odor. It does NOT cover the smell, it actually removes it! How does it do that? Read below HOW IT WORKS - Mosa Bamboo charcoal has millions of pores that work together to act like a sponge. As air passes through the pouch, the bamboo charcoal that has a light ionic charge attracts particles. This ionic charge traps odors, pollutants and moisture. ALL NATURAL- No fragrance, no chemical and non-toxic which makes it children safe and pet friendly. It's a different bamboo than the one Panda's eat, so we're not harming them either!