Lovely portrait. Looks cold to me with all that snow. The polaroid effect (as MelonMusketeer said) gives it a special effect, just wondering how it would look with white snow.
The slight color cast, low levels, and low contrast combine to give this an effect much like a polaroid shot. I don't know if this was done while shooting, or in post processing, but in either case, it gives the shot a very nice rero look.