So this is the first year that we're taking our toddler skiing, just want him to experience it now so that he will (hopefully) love it as much as we do. And we want to be extra cautious with keeping him warm. We gonna be layering him up, and we have thermals and stuff, but been wondering whether we need to get one of these for the pram: http://www.prams.net/kaiser-iglu-footmuff? Is it necessary, it says it's for winter, but do you think it's gonna be warm enough for snow, and is it necessary? Does anyone have any other suggestions? Thanks!