I ordered these for use in a large suitcase for travel purposes and was abit skeptical that you get 10 for less than 10 pounds, I thought the quality might be bad and that they would not stay deflated.
I was wrong I put a pillow inside of one, vacuumed the air out and left it to see how long they stay deflated. after about 27 days it is still deflated and no air has gotten in, so they get 5 stars from me