Essential. Once went on a ski holiday where a friend ended up in bed 3 days from sunstroke and 3rd degree burns to face and neck. Don't forget UV rays can reflect from snow and hit you right under your chin.
The little tubes with lipblock on the ends are really good. Boots or any other, usually specified for skiing.
I was looking for suncream, have the gob gear but need the face n neck variety..spotted the smallest tube ever for £13 (for winter sports) and nearly fell over with the shock..
Can I bring the factor 45 baby stuff I usually use (I actually store it in the fridge so that it doesn't go off, how sad am I?!) or do I have to get a special mountains/winter one? Can I buy it there?