Kudos to Dance4Less for replacing right away the pair of legwarmers that stretched out of useability within a week. However, no product should become useless so quickly.I bought two pairs - black & dark grey. The dark grey turned out to be rather light grey -- but, hey, that's the risk of purchasing things online. The black pair I wore - without first washing them - and each stretched badly. One of the two would not stay up after the 4th wearing.The replaced pair I washed/dried before wearing, and it seems to be working better.