Summarize this article in one sentence.
Over time, exposure to the sun’s UV rays will take a toll on the elasticity of your skin. The best way you can keep your skin looking young is by protecting it from the sun. If you’re going to be outside for more than 15–20 minutes, slather on a high-SPF sunscreen and wear a hat to protect the skin on your face and head. These protective measures will also protect your skin against melanoma and other forms of skin cancer. to prevent skin from wrinkling and sagging. Chemicals found in cigarettes, cigars, and other smoking devices accelerate the aging process of skin across your body. Heavy smokers as young as 30 may begin to notice that they’re already losing skin elasticity and developing wrinkles. To reverse this unhealthy process, stop smoking as soon as possible, even if you only smoke infrequently. Fortunately, your skin can repair itself, and it will regain some of its youthful elasticity in the weeks and months after you cut out smoking. While you’re sleeping, your body produces collagen and fights off free radicals that would otherwise break down the elasticity in your skin. If you’re an adult between the ages of 26 and 64, try to get a full 7–9 hours nightly. If you routinely sleep fewer than 6 hours a night, you’ll soon start to notice that your skin has lost elasticity and looks older and more wrinkly.

Summary:
Wear sunscreen and a hat when you step out into the sun. Stop smoking Sleep at least 7–9 hours a night so your body can regenerate collagen.