Big Bro Ninja T-Shirt - Big Brother Funny Siblings Gift Idea Solid colors: 100% Cotton; Heather Grey: 90% Cotton, 10% Polyester; All Other Heathers: 50% Cotton, 50% Polyester Imported Machine wash cold with like colors, dry low heat Big Bro Ninja T-Shirt - Big Brother Funny Siblings Gift Tee Cool gift idea for soon to be (and current) big brother. Great gift tshirt for big brothers, little brothers, siblings, boys, kids, soon to be big bro, parents announcing a new baby addition to the family, Christmas and birthdays! Lightweight, Classic fit, Double-needle sleeve and bottom hem