UVA rays between 380-400nm penetrate deeper than you think. They slip past most sunscreens and trigger the cellular damage behind dark spots and premature aging. La Roche-Posay Anthelios UVMUNE 400 Invisible Fluid was built to stop them with Mexoryl 400, the filter that blocks the longest, most damaging wavelengths other formulas miss.

Key Benefits

• Mexoryl 400 filter technology: captures ultra-long UVA rays (380-400nm) that cause deep cellular damage and photoaging
• SPF 50+ broad-spectrum shield: blocks UVB rays that burn skin and UVA rays that break down collagen year-round
• Invisible, non-greasy finish: absorbs instantly with zero white cast, layers seamlessly under makeup
• Water and sweat resistant: Netlock technology keeps protection intact through swimming, perspiration, and sand exposure
• Anti-eye-stinging formula: dermatologist-tested comfort for sensitive skin, safe for reactive and sun-intolerant faces
• Lightly fragranced fluid: subtle scent makes daily SPF feel less clinical, more like part of your routine

Key Ingredients

Mexoryl 400 (Methoxypropylamino Cyclohexenylidene Ethoxyethylcyanoacetate): La Roche-Posay's patented UV filter that blocks ultra-long UVA rays (380-400nm), the hardest wavelengths to stop and the ones most responsible for deep DNA damage. Netlock Technology: a film-forming polymer network that locks filters onto skin, keeping your SPF shield intact even when wet or sweating. La Roche-Posay Thermal Spring Water: selenium-rich soothing water that calms sensitivity and strengthens your skin barrier against environmental stress.

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