Take a fresh look at a classic. The inspiration for these adidas Firebird track pants comes from a vintage Japanese design. They're also made with recycled materials. Who knew that upcycled plastic waste could be transformed into your new favourite pants? This product is made with Primeblue, a high-performance recycled material made in part with Parley Ocean Plastic. Regular fit. Drawcord on elastic waist. 100% recycled polyester tricot. Heavyweight fabric. Front zip pockets.