High energy and fun, the new Penguin Peak is one your little cubs wont have to grin and bear. Finetuned with a performance fit that accounts for growth spurts, this Midweight OTC offers improved calf sizing for kids who wont stop growing. And as if Penguins werent cool enough, this sock is also thermo-regulating - so the hotter their little piggies run, the cooler they'll stay. | Darn Tough Socks Penguin Peak OTC Midweight Socks in Blue | Size Medium