Ordered a couch & loveseat cover & put them on. I found they moved a lot & the back would fall off.  So, I found a set with straps designed to keep the covers in place & tried them.  They were the worst.. Those covers didn't fit the couches at all and the straps were worthless because of how the were placed.  I threw those out & came back to these I ordered b/c they were much better fit & once I added fishing weights to the top of the cover that hung over the back, they stay in place much better.  They are easy to take off, launder, & replace.  So far, they are holding up very well.