Personalized Irish Flag St Patrick's Shamrock Men's V-Neck T-Shirt. Irish flag Men's V-Neck T-Shirt - White for St. Patrick's Day has shamrock clover in green. 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