3 Reasons to Wear Sunscreen While Skiing
Snow reflects up to 80% of UV rays, hitting you from above and below. This doubles your exposure compared to most other winter activities.
Higher altitude increases UV intensity by about 10-15% per 1,000 feet. You can still burn on a cloudy January day.
Wind and cold mask the sensation of sunburn, making you think you are fine. Use lip balm with SPF for the same reason.