Zinka's proven formula withstands the most extreme weather conditions performing flawlessly in wind, hot, cold & wet. Zinka Nosecoat works as a sunblock not as a "sunscreen" and is made from zinc-oxide. A clear sunscreen simply cannot provide total protection. It's clear, the sun`s harmful rays will eventually penetrate the skin. It is the color that stays on the skin that ensures maximum protection by not allowing sunlight to be absorbed by the skin.