I'm very thankful for "Space Bags". They saved my life haha! I bought some last Sunday, the same day we had that bad luck with our truck at Wal-Mart, anywho... I added sweatshirts and bulky winter jackets in them, vacuumed the air out and sealed them shut... Since then, these bags still have absolutely no air in them and my clothes are all tightly packed! I love it. All those big wool sweaters are coming with me to Czech Republic. Woohoo!!!