adidas Originals Firebird Full-Zip Track Jacket - Men's One of the most iconic and best-selling tracksuits of all time. The adidas Originals Firebird Track Jacket defines the adidas brand. With a comfortable, relaxed fit that appeals to the masses, the Firebird ensemble won't be going away any time soon. 100% shiny polyester tricot with zip pockets, 3-StripesŪ down arms, ribbed cuffs and waistband and embroidery chest logo. Imported.