Gravity, sun, bras, sleeping positions, breast size, weather and plain-old neglect can produce unsightly wrinkles where you least expect it. The skin of the décolletage is quite thin and under a lot of pressure. That being the case, it’s one of the first places women start to show signs of aging. A good vitamin-rich moisturizer is recommended to combat collagen breakdown. If you find that you already have some deep wrinkles forming, apply moisturizer liberally, use sunscreen and try sleeping with a pair socks between your boobs.