Protection for the ears is desirable on most ski days. Also good for extra protection on cold days. Waterproof boots with a high top are best for walking around the ski area. Plastic lenses will not break if you fall. Special frames are available for those who wear glasses.
Sunglasses are great for warm days.
Lips, nose and ears are trouble points. If you are sensitive to the sun, take zinc oxide. Chap Stick or lip balm will prevent chapped lips. Most trips offer rentals as an optional add-on to the trip price. Equipment should be custom fit to your size and ability and to local ski conditions.