If you're among the 10 million skiers and snowboarders hitting the slopes in winter, pack your sunscreen. It's easy to think that a cold environment frees you from the risk of sunburn, but solar ultraviolet (UV) rays actually can be more damaging on the slopes than on the beach.

For every 1,000 feet of elevation, UV exposure increases 8 to 10 percent. A skier with an "average" complexion, at 11,000 feet above sea level in Colorado, will burn at noon after just six minutes of unprotected sun exposure, compared with 14 minutes in Florida. Plus, snow reflects nearly 80 percent of the sun's UV rays, so that you are hit by the same rays more than once.

To save your skin in the ski season, practice these safety strategies:

• Limit the time you spend in full sunlight, especially between 10 am and 4 pm.
• If you are on the slopes much of the day, take breaks indoors to rest your skin.
• Drink plenty of water to avoid dehydration.
• Wear long-sleeved shirts and long pants made of dark or brightly colored, tightly woven fabrics; these offer greater protection.
• UV exposure contributes to several serious eye disorders, including cataracts and macular degeneration. To cut down on UV from above and reflected off ice and snow, wear a hat and UV-blocking sunglasses with wraparound or large frames. These protect not only your eyes, but your eyelids and the sensitive skin around your eyes.
• Apply a broad-spectrum sunscreen with an SPF of 15 or higher, on your face.
• Use a lip balm with an SPF of 15 or higher to protect against sun and wind.
• Spread it liberally (two ounces, a golf ball-sized amount) and evenly over all exposed skin.
• Be sure to cover often-missed spots: ears, around eyes, neck, scalp, hands.
• Reapply at least every 90 minutes — more often after sweating or exposure to wind and snow.