Nike Track Pants Infant Boys. These pants are perfect for both casual wear or a range of sporting activities. They feature an elasticated waistband, an adjustable inner drawcord, and zip expanders to the ankles for a secure and comfortable fit. Contrasting panels to the side give a great casual look. The Nike Swoosh is featured to the left thigh. These pants are made from 100% polyester and are machine washable. Keep away from fire.