I have been wearing socks to bed for years. They definitely help with cold feet. They can also soften callouses and make toenails less brittle if you take the time to rub lotion on your feet before you put on the socks. I like CeraVe cream for my feet and Theraplex ointment for my toenails. You may need to ask your pharmacist to order the latter. But two cautions: 1) the socks should be made of breathable fibers, lightweight wool being tops; 2) slouchy socks without spandex are best because you don’t want to cut off circulation. My favorite bed socks are some very old all-wool, white, crew socks made by Wigwam. I darn them once in a while because I don’t think Wigwam makes them anymore..