Are ski helmets suppose to fit like skate helmets?
I’m guessing your helmet is too big for you. Options: See if you can get padded inserts to put inside the helmet. You could see a ski shop, they may be able to help with that, or provide more expert recommendations…like purchasing one of their products. You could wear a beanie or balaclava under the helmet, but that might get hot. Definitely check to see that your chin strap is snugged up. Beyond that, you may need a new helmet. If your helmet is slipping back that far, you are loosing protection in the area most likely to be impacted on hitting a rock or a tree, sort of defeating the purpose in wearing a helmet. Plus, on a cold day, that would really suck…that wind hitting smack on the forehead. I just have a tiny gap, and it was uncomfortable today, in colder temps!