"Combination skin is always a bit tricky and really requires you to know your face," Idriss says. "I recommend a combination of a lightweight formulation to use all over and sunscreen powder to help even it out, particularly around your T-zone." She also recommends looking for mineral sunscreens, as they are typically less irritating. She likes SkinCeuticals Physical Fusion UV Defense SPF 50, $34, which provides adequate UVA/UVB protection and uses a weightless fluid formula.

When it comes to sensitive skin, Idriss recommends sticking with mineral sunscreens that contain physical blockers titanium dioxide or zinc oxide. These products tend to be less irritating than their chemicals counterparts and therefore are better tolerated, she says. She recommends Eau Thermale Avene Mineral Ultra-Light Hydrating Sunscreen Lotion SPF 50+, $28, which offers SPF 50 protection and provides long-lasting hydration throughout the day.

If you're in doubt of which product to actually use, Idriss suggests looking for sunscreens that are formulated for babies, as she says chemicals like PABA and oxybenzone are known to irritate babies' skin.

"Mature skin not only benefits from hydrating ingredients but also anti-aging ingredients," says NYC-based cosmetic dermatologist Sejal Shah. For a sunscreen that incorporates both hydrating and anti-aging elements, Shah recommends La Roche-Posay Anthelios AOX Daily SPF 50 Sunscreen, $42.50, which provides SPF 50 protection and helps fade away the appearance of fine lines and dark spots.

"Physical sunscreens are best for people with acne-prone skin," board-certified dermatologist Dr. Dendy Engelman says. Engelman says this skin type should look for oil-free, gel textures with titanium dioxide and zinc oxide that won't clog pores. She says SkinCeuticals Physical Matte UV Defense SPF 50, $34, will successfully mattify the skin without leaving a white or chalky residue after application.