Oregon Ducks Colosseum Boys Long Sleeve T-Shirt. The t-shirt is a 52% Cotton/48% Polyester dual blend for long lasting comfortable wear. The Ducks tee features a screen-printed design on a team color shirt with secondary team color sleeves. This Oregon t-shirt combines all of the elements of the team for that extra pop of pride. Clothing is easy to maintain and made to last season after season as they are machine washable. Show your little Ducks fan's style all while keeping warm on the field or at the tailgate! Officially licensed Oregon Ducks fan gear.