As described and they work. I rent part of a double room and on my side there is unfortunately carpet in 2 rooms and it always smells of mold or mildew although I have cleaned the carpet thoroughly with odor absorbers, but that only lasts for a day. I've had them for 4 days now and they're still working. I even put one in the front room of the house where outside smells usually come from the air conditioner. This room alone is 90% better. I also bought a rug to cover the stove in the hallway and it smelled like rubber or a chemical smell, I took one from the bedroom and put it in there, the smell from it halved throughout the day and the next morning I got it Haven't felt it since then and haven't smelled it to this day! It comes with instructions: once a month, expose it to the sun for an hour to reactivate the charcoal. I suggest you do this when you receive them. They also come with small hooks for hanging, so don't worry! As for the smell, I personally didn't feel anything from them. They're about the size of beanbags, and I'd say no bigger than a sandwich bag. They each have a label that tells you what they are made of and what they are for. If you don't want to see you can flip them over and hang them like that, I honestly don't mind.
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