Yes, you can apply sunscreen without using moisturizer. Sunscreen is designed to protect your skin from the harmful effects of the sun's ultraviolet (UV) rays, while moisturizer is used to hydrate and nourish the skin. While some sunscreens may have moisturizing properties, it is not necessary to use a separate moisturizer before applying sunscreen. However, if you have dry skin, using a moisturizer before applying sunscreen can help keep your skin hydrated and prevent it from drying out. It ultimately depends on your skin type and personal preference.