Koloa Surf Co. Hammerhead Shark Logo Mens Heavyweight T-Shirts Nothing beats this traditional t-shirt in comfort, versatility and casual style. 6.1-ounce, 100% soft spun cotton 90/10 cotton/poly (Athletic Heather) 50/50 cotton/poly (Dark Heather) Rib knit collar. Koloa Surf Co. Hammerhead Shark Logo Mens Heavyweight 6.1-ounce, 100% cotton T-Shirts in Regular, Big and Tall Sizes. A reliable choice for comfort, softness and durability. Printed with KOLOA SURF Hammerhead Shark Logo on Front of Shirt