Koloa Surf Co. Hammerhead Shark T-Shirts in Regular, Big and Tall Sizes 100% Cotton Koloa Surf Co. Hammerhead Shark Logo Mens Heavyweight 6.1-ounce, 100% cottonT-Shirts in Regular, Big and Tall Sizes. A reliable choice for comfort, softness and durability. Heavyweight 6.1-ounce, 100% soft spun cotton. Printed with KOLOA SURF(tm) Hammerhead Shark Logo on Front of Shirt Heavyweight 6.1-ounce, 100% cotton (preshrunk) Shoulder-to-shoulder taping Coverseamed neck Double-needle hem Adult Sizes: S-6XL