My mom's dermatologist praised this multitasking SPF—now it has taken the place of three of my skincare essentials.

      For almost four years, I have been evaluating, writing about, and rating beauty products as my primary occupation. After countless formulas, what once felt like the ultimate paradise for beauty enthusiasts now resembles a cramped storage room filled with Sephora products in my small New York City apartment. Consequently, I am becoming more hesitant to add new items to my extensive collection; they must prove their worth. “Do I truly need another sunscreen?” I frequently ponder as I place yet another colorful bottle on my overflowing vanity. However, after trying Isdin’s Fusion Water Magic Sunscreen, I realized the answer was indeed yes.

      **ISDIN Fusion Water Magic SPF 40**

      Weeks ago, when my mom reached out to inquire about which beauty products she could bring back home after her upcoming visit—her favorite activity is rummaging through my collection—she gasped when I told her I had a bottle of the IYKYK sunscreen before heading to Miami. “My dermatologist recently mentioned that!” she exclaimed on the phone. During her last appointment, where they monitored her old sun spots and discussed new sunscreen options, her dermatologist had described Isdin’s hydrating sunscreen fluid as the best for her skin this summer. “She said it’s expensive for the size, but worth every drop,” my mom added. “Can I take that one?” she asked, sounding hopeful. Unfortunately, it was one of the products I decided to protect before my rather warm trip to Florida. (Don’t worry, I found a travel size for her later.)

      With the glowing endorsement from my mom’s dermatologist in mind, I chose to hold off on testing this highly rated formula until I was finally under the Florida sun. After a seemingly never-ending frigid winter on the East Coast, I had some anxiety about how my skin would react to strong UV rays—so trying a new sunscreen on my sensitive skin felt like a risky venture. The stakes were high, but I was ready to take the leap for effective sun protection. With that, I took the plunge.

      **The Formula**

      Before sharing my Miami adventures—filled with great eateries, outfits, and tennis matches—I need to break down this celebrated sunscreen's formula. As Spain’s premier suncare brand, Isdin has combined over 50 years of research and development with the Mediterranean lifestyle (think extensive sunbathing, swimming in the sea, and consuming healthy fats for skin health). This has led to the creation of a number of acclaimed sunscreen and skincare products, including the Eryfotona Actinica Mineral Sunscreen and Isdinceutics Retinal Advanced Night Serum, with their latest standout being Isdin’s Fusion Water Magic with SPF 40.

      While this milky solution may appear to be a chemical sunscreen, it offers much more at the ingredient level. It is marketed as a 2-in-1 moisturizer and sun protector, enveloping the skin in a nourishing blend of hyaluronic acid, vitamin E, and Mediterranean algae (which provides hydration for up to 12 hours) while simultaneously protecting the skin from harmful UVA/UVB rays with SPF 40. When I asked double board-certified dermatologist Latanya Benjamin, MD, what sets this sunscreen apart from others in its crowded category, her response was straightforward: “It protects beyond UV.”

      Most sunscreens provide only basic protection against the sun’s ultraviolet radiation, which, if not applied correctly (typically 15 minutes before sun exposure and reapplied every two hours), can result in painful sunburn or even sun poisoning. In fact, neglecting to use sunscreen properly can eventually contribute to skin cancer. However, I don’t share this information to deter you from enjoying warm weather but rather to encourage a closer examination of the SPF products you choose. By 2026, your sunscreen should offer more than just a pasty white barrier against UV rays.

      Benjamin elaborates that Fusion Water Magic goes above and beyond to protect the skin from modern environmental threats, making this sunscreen not your mother’s traditional SPF. The formula provides “360° protection” against not only sunburn but also blue light (given our constant screen time), photoaging, heat damage, infrared, pollution, and free radicals. These impressive claims are enabled by its advanced ingredient list, which combines chemical sunscreen filters like avobenzone (which my sensitive skin has historically struggled with) along with local components like Mediterranean algae. “It serves as a major antioxidant defense against environmental stressors that could lead to hyperpigmentation and collagen breakdown,” says Benjamin about the local ingredient. She highlights that this regional algae naturally helps guard against visible blue light, explaining the sunscreen's protective capabilities.

      When I inquired why this particular sunscreen doesn’t result in the usual eczema and irritation that some chemical formulas have caused me in the past, she attributed it to the product's formulation. “This sunscreen’s unique fragrance-free formula and its three key ingredients are suspended in an aqueous (‘Fusion Water’) base, which supports the skin barrier,” she clarifies