Bob the Shark - Kids Socks (Ages 3-7) Sharks live in every ocean on the planet. Sharks do not have bones. Sharks use their gills to filter oxygen from the water. I just think sharks are really cool. 85% Peruvian Cotton, 10% Nylon, 5% Spandex Small and Medium Sizes have 3D element. Attention getting design - Exciting colors. Socks sure to inspire imagination! Boys and girls! High quality fabric that will not rip or tear - Very Comfortable Best if washed in cold water. With your purchase, the Sock Panda donates socks to someone in need. Thank you!