Just like our bicyclers in the club it is smart to have a little protection with the speed and obstacles at the ski resorts. I would recommend to check around at various ski shops at the resorts or read up on helmets in ski magazines. You can also take your helmet off on the lift ride up to keep cool. In order to get the most protection out of a helmet it must fit properly, and you must be wearing it. Try several helmets on to find the proper size.
Some helmets allow for the addition of extra padding for a good fit.
A helmet should be snug, but not uncomfortable. If the helmet is not comfortable it's not for you. After finding the proper size, check that the chin strap fits snugly but comfortably under your chin. Always keep the chin strap fastened when skiing as it's the one thing keeping the helmet on your head in a crash. Safety is the most important feature when looking at helmets.