Koloa Surf Black Marlin Logo Heavyweight Cotton T-Shirt. Mens Heavyweight 6.1-ounce, 100% soft spun cotton cotton T-Shirts in Regular, Big and Tall Sizes. 90/10 cotton/poly (Athletic Heather). 50/50 cotton/poly (Dark Heather). Rib knit collar. Shoulder to shoulder back neck tape. A reliable choice for comfort, softness and durability. Black Marlin logo printed on shirt.