Get into the holiday spirit with this clever "Oh Geometree" T-shirt! Featuring a festive Christmas tree design composed of mathematical formulas, this shirt is perfect for teachers, students, or anyone with a love for geometry. The tee appears to be made of a comfortable, black, cotton blend. The graphic is green, yellow, brown and red, featuring a gold star on top of the tree. Wear it to holiday parties, school events, or simply to showcase your unique sense of style. This unique T-shirt combines holiday cheer with a love for mathematics in a fun and stylish way.