from
http://jillipoo.blogspot.com/2008/12/cold-weather-hair-care.html:
"When the weather gets cold, your primary goal is to keep your hair moisturized. It's impossible to get the moisture from the air, so you have to use products that will do the trick. This means lots of aloe vera, creams, and butters (if you hair can tolerate butters). Humectants such as honey or glycerine may defeat your purposes -- remembers that humectants pull moisture wherever it's needed, so if the hair is dryer than your hair, guess where the humectant will pull from to try to hydrate the air??
In addition to the dew point situation, you also have to remember that your hair cuticle is tighter (
like most things, hair contracts when it's cold). This means that not much pollution is getting in, sure, but it also means that not much moisture can, either. Even the type you apply yourself. Where does that leave you? For some people, it means just using bigger helpings of moisture. For others, it means applying moisture more than once a day."