Guerrilla Tees Youth Heartbeat of a Gamer Tshirt Funny Gaming Tshirts Video Game Shirt Super Soft screen printed tees with a vintage look and feel! Fashion fit plus extreme comfort. You won't believe it until you try one on. Our Standard colors are 100% Premium Cotton Our Heather tees are a polyester cotton blend. Guerrilla Tees and the Guerrilla Tees Brand  are registered and trademarked