The Protect step completes the iS Clinical Cleanse, Treat, Hydrate, Protect regimen with pharmaceutical-grade broad-spectrum sun protection that helps shield skin from both UVA and UVB exposure while supporting the appearance of a healthy, even-looking complexion. iS Clinical sun protection products pair advanced UV filters with antioxidant support to help preserve the benefits of your skincare regimen throughout the day.

Eclipse SPF 50+ is the collection's best-selling daily sunscreen, delivering lightweight, translucent mineral protection that layers seamlessly over treatment serums and moisturizer. Its non-greasy formula works across all skin types without leaving a white cast. For multi-benefit protection,  Extreme Protect SPF 30 utilizes chemical UV filters combined with DNA protection enzymes and potent antioxidants for comprehensive environmental defense.

Extreme Protect SPF 40 offers broad-spectrum mineral protection with the same advanced DNA protection technology in a moisturizing formula suited for daily use. For convenient touch-up protection, PerfecTint Powder SPF 40 delivers mineral sun protection in a portable powder format with a natural tint. LIProtect SPF 35 rounds out the collection with dedicated lip sun protection.

Apply sun protection as the final step every morning, even on cloudy days, and reapply every two hours during extended sun exposure. Trusted by professionals in 120+ countries.

Build your complete regimen starting with the Cleanse step, or find your ideal protocol with the skincare recommendation quiz.