These are wonderful! I use them to carry and secure a stack of 20x30" trays that I use for work. There is no elastic "give", so they hold everything together very tightly just how I need them to, and I have never worried about loosing my trays that probably weigh 40 pounds. I have been using them every weekend for about 1/2 a year now and they haven't lost any of their velcro quality. Highly recommended.