Personalized Pi Math Day grunge Men's V-Neck T-Shirt. Pi Math Symbol Men's V-Neck T-Shirt - Red has fun grunge look. graphic licensed from and c. www.graphicsfactory.com 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