Personalized Black Sombrero Cinco De Mayo Men's V-Neck T-Shirt. Cinco De Mayo Fiesta Sombrero Men's V-Neck T-Shirt - White makes a great custom holiday gift. Celebrate May 7th in style. Viva la fiesta. 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