Koloa Surf Kids Shark T-Shirts in Youth Sizes XS-XL Koloa Surf Co.(tm) Hammerhead Shark Logo Kids Heavyweight 6.1-ounce, 100% cottonT-Shirts In Youth Sizes XS-XL. 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 1x1 rib knit collar. Shoulder-to-shoulder taping.Coverseamed neck Coverseamed neck. Double-needle sleeves and hem. Ash is 98/2 cotton/poly. Athletic Heather is 90/10 cotton/poly. Dark Heather Grey is 50/50 cotton/poly Youth Sizes XS-XL