Soccer Warm ups?

A lot of girls at my school are on club soccer teams. They wear these sweats to school that are loose at the thigh and get tighter and have a zipper at the calf. They're puma or adidas brand. They said they got them from their soccer teams. I run half marathons and play lacrosse, and i want to get these so i can take off my warm ups without taking off my shoes. Does anyone know where i can get these pants?