SPF is a vital part of any skincare routine and should be the last step. It’s even important on days when the sun is not as abrasive. Even in the winter months, dangerous UV rays can still penetrate through clouds, and even windows, making you vulnerable to harsh skin damage. This is especially the case if your skin is not fully protected. Sun damage can lead to dark spots, wrinkles and in some cases, skin cancer. SPF needs to be applied daily