The solution: mix two parts sunscreen and one part foundation on the back of your hand. Apply by dabbing the mixture along your jawline and neck with clean hands, then proceed to rub the sunscreen/foundation in evenly. By mixing sunscreen in with your foundation and applying along your jaw and neck, you will fade the coverage from medium/full on your face to light coverage on your neck. Use this method to prevent unsightly makeup lines!
*Choose a sunscreen that best suits your needs as far as protection factor, skin type, ingredients, etc. An oil-free option that is meant specifically for face is always a must.