adidas Originals Firebird Track Pants. The Firebird Track Pants are a nod to the classic brand style, reimagined for today's lifestyle. Whether you're heading out for a casual day or lounging at home, these tracksuit bottoms are your go-to choice for style and comfort. With a regular fit and adjustable drawcord closure, these statement trousers offer a comfortable feel for everyday wear, making them a versatile go-to for a varied schedule. The tricot fabric provides a soft and smooth feel against the skin. Regular fit. Drawcord waist. 100% Recycled Polyester. Machine wash. Imported.