Personalized Happy 100th Day Of School Men's V-Neck T-Shirt. Happy 100th day of school Men's V-Neck T-Shirt - Black is a great fun way to celebrate this school year milestone with a class party. 4.7 oz., 100% pre-shrunk cotton Narrow, set-in 1x1 mitered V-neck collar Shoulder-to-shoulder taping Double-needle stitched sleeves and bottom hem