Courtesy of Rachel Rebibo/thelicensingproject.com
The sun is responsible for much of what many people assume is normal aging: wrinkles, sagging, discoloration, and dullness. If you have any doubts, compare the back of your hand to, say, your actual backside. One sees the sun pretty much every day, while the other sees it significantly less; even the most committed nudist has significantly nicer skin on their butt than on the backs of their hands. Over time, the sun has a big, big impact on the way our skin looks and feels.
The very best way to minimize sun damage is to prevent as much of it as you can in the first place. Short of a Gollum-style existence in a cave or an underground bunker, sun exposure is inevitable; everyday exposure adds up quickly, so focus daily on often-exposed areas like your face, hands, and chest.