just amazing! I don't know what people did wrong in the negative reviews. The king size bag fits a 9 inch mattress and hasn't taken in air for three days. Also airtight! I sucked out the air and adjusted the mattress to fit my Prius. Not sure because it's a 9 inch mattress but good luck rolling it as small and tight as the picture. Too bulky but that's how big it was when it was sent to me. A few tips: 1. Buy extra straps. There are two but one isn't long enough so I had to stitch them together to make one. But I added one more thing and it helps.2. Use your fingers to ensure the zipper is closed securely. The plastic slider doesn't seal very well.
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