Review on Mayunuo Activated Bamboo Charcoal Air Purifying Bags - 15 Pack, Odor Absorber & Moisture Absorbers for Home, Car, Closet, Basement, Pet, and More - Natural Fresheners & Deodorizers by Mary Hall

These work quite well. I use them to absorb odors from kitty litter. They won't eliminate the odor, but they will help reduce it. I also wash my cat house 2 times a day. Once in the morning and once in the evening. In terms of moisture absorption, they're fine for very small spaces, but don't think they'll help in a damp basement. To do this, you need a real dehumidifier. Let them "charge" in the sun for about an hour before use. Refresh them by "recharging" them in the sun for about an hour, as needed. I attached the star to the so-called fabric case. It's a kind of synthetic material. It's not eco-friendly.