Good-luck for Your Feet: Lucky Socks are made from the world’s finest cotton 95% , with a little bit of elastic and nylon for stretch. ensuring a cozy fit and breathable comfort for your feet all year round – winter, spring, summer, and fall Best of all the socks are antibacterial, which is also known to kill up to 99% of common bacteria , and your feet won’t smell - which is always a plus!