Personalized Cinco De Mayo Flags Youth T-Shirt. Party all day on May 5th with a fun Youth T-Shirt - Pacific Blue gift that has red, green and black banner flags and a holiday quote. Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.