Choosing the right ingredients for your skin type is essential to get the most benefits out of your spa face mask. Start by identifying your skin type, whether it's oily, dry, combination, or sensitive. Then, research ingredients that are suitable for your skin type. For example, oily skin types may benefit from ingredients like clay, lemon juice, and witch hazel, while dry skin types may benefit from ingredients like avocado, honey, and oatmeal. Always patch test new ingredients before using them in a mask and consult a dermatologist if you have any concerns.