These are the best vacuum bags, I bought so far. Besides that, the bags are very convenient, they are absolutely airtight, stable and can be closed easily. On each bag a zipper is attached. (I had already bought that, there was only a zipper per pack and then you had to always look for.) If time is short, I will turn the air simply by forking out (like an air mattress), but with a vacuum cleaner goes there naturally faster and better. A plastic odor I could not tell, though I have a very sensitive nose. Value for money is top. Definitely buy recommendation!