Comes in a sealed cube, nice and clean. What you have to do is simple, just cut open the pouch, let the air in and wait for it to rebound. Or, if you can't wait, just soak it in water (I made this with bottled water for less chloride). I was concerned about the smell and smell of chemicals prior to purchase but it turned out not to be a problem. This is good value for a 20x20 inch rug.
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