La Roche-Posay Anthelios UVMune 400 Invisible Fluid SPF50+ is a high-protection sunscreen that provides ultimate UVA/UVB protection with innovative UVMune 400 technology. This lightweight, invisible fluid formula offers very high broad-spectrum protection while being suitable for sensitive skin. The sunscreen features an ultra-resistant formula that is water, sweat and sand resistant. It has a non-greasy, non-sticky texture that absorbs quickly without leaving white marks. The product contains La Roche-Posay Thermal Spring Water and provides protection against UVA rays up to 400nm. For optimal protection, it should be applied generously before sun exposure and reapplied frequently, especially after swimming, sweating or toweling.