DURABILT Adult Cotton Low Cut Comfort Sock (3-Pack) "Med" 9-10 84%cotton Machine wash cool water non-clorine bleach Great all around sock  exercising, hiking, walking, or biking Arch support with vents keeps your foot energized Low profile footie style. If shoe size "11" Order next size up. Yarns: 84% cotton,7% nylon, 4% elastic/e'lastique, 3% lycra 2%polyester Padded heel adds comfort and durability without adding bulk to sock