Can I leave the BISOU hydrogel eye patches on overnight for deeper hydration?

These patches are specifically formulated as an "express care" product, meaning they are intended for short-term use rather than extended overnight wear. The hydrogel format is designed to sit closely on the skin for a brief period to deliver a quick cosmetic boost, such as reducing the appearance of puffiness or refreshing the under-eye area before makeup or an event. Leaving them on for several hours or overnight is not advised for several practical reasons. First, as the hydrogel material dries out over time, it can begin to draw moisture away from the skin rather than depositing it, potentially leading to increased dryness or irritation around the delicate eye area. Second, the specific concentration of actives like caffeine and niacinamide is calibrated for short contact times; prolonged exposure does not necessarily increase benefits and may overwhelm sensitive skin. For best results, follow the typical usage for this format: apply to clean skin for the recommended short duration (usually 10-20 minutes, though specific timing should be checked on the packaging), then remove the patches. If you are looking for overnight hydration, a dedicated eye cream or sleeping mask would be a more suitable choice in your routine. Always avoid direct contact with the eyes during use, and if your skin is very reactive, introduce the product cautiously and stop use if irritation appears.