Ducks are waterproof, but these socks are not! They are light and comfy on the feet though, no need to go up a shoe size to give your foot room to breathe.
THE KNITTY GRITTY
Sock size 10-13 fits U.S. men’s shoe size 7-12.5
Fiber Content: 70% Cotton, 27% Nylon, 3% Spandex