Davinci drummer shirt funny music shirt drumming shirt percussion tshirts, Brown, Large. BEWARE OF COUNTERFEIT PRODUCTS BEING SHIPPED FROM CHINA!. THERE ARE NO AUTHORIZED SELLERS OF GUERRILLA TEES PRODUCTS. Our Standard colors are 100% Premium Cotton Next Level or Alstyle Tshirts. Our Heather tees are a polyester cotton blend. Guerrilla Tees® and the Guerrilla Tees Brand ® are registered and trademarked.