We recommend that you stay away from cotton. If your feet sweat at any time cotton will keep the moisture close to your skin.
Although it seems counter intuitive wear thin natural wool such as our alpaca socks. Alpaca has exceptional moisture wicking properties which keep any moisture well away from your feet. It's also a hypoallergenic fibre and so has no lanolin, making it perfect for anyone with sensitivity to normal wool.
The bed socks have the same qualities so at night when the temperature drops drastically in a cloudless sky you can be quite cold in bed but as the temperature rises in the early hours your feet will remain at the same temperature and never be too warm. Alpaca is an extraordinary fibre!