If you are searching for a sporty old grandma costume you might want to take a look at the Granny Nylon Mesh Costume. This fun sporty old grandma costume comes in a variety of colors, but it also has two adjustable leg sets so your grandkids can change up the positions on their legs as they please. The two leg sets are made from a stretch fabric that is a great deal more flexible than nylon. When your kids put their legs together the fabric is much tighter and gives them a more defined outline. It also means that they can easily tuck their legs in and out of the costume without worrying about the fabric slipping off.