adidas by Stella McCartney's stretch-jersey track pants are made using recycled materials that would have otherwise gone to waste. They're detailed with a contrasting zipper that runs the entire length of one leg and can be undone to adjust the shape. The elasticated waistband ensures a comfortable fit.This product Reduces Waste. Find out more about NET SUSTAIN "https://www.net-a-porter.com/en-au/campaigns/net-sustain">here.