THE ELEMENT OF SURPRISE! T-SHIRT Funny Science School Stud 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 Perfect for Birthdays and Valentine's Day. Or Graduation and back to school present. Even for Christmas, Black Friday, thanksgiving or Halloween. Know a sister brother father daughter or mother that needs this? Science Teachers, School Students, Chemistry, Physics Tee Lightweight, Classic fit, Double-needle sleeve and bottom hem