Your skin is experienced skin! It already has fine lines and wrinkles, while smile lines (also known as nasolabial folds) and crow's-feet are becoming more obvious. Your skin is becoming increasingly thinner and starting to sag, with a loss of tone around the jawline, neck and décolleté. You may have some dark spots too.
All of this is due to a reduction in the activity and number of fibroblasts (the cells that produce collagen and elastin), as well as a reduction in levels of hyaluronic acid, which occurs naturally in the skin.
We tend to use the term "mature skin" from around the age of 45, when the first signs of menopause usually appear.
You need to look after your skin well and give it lots of care in order to maintain its hydrolipidic film, which helps to keep skin nourished and protects against environmental aggressors.
