A chemical sunscreen lotion specifically developed for dehydrated skin, featuring a unique formula that includes 100kDa hyaluronic acid. This small-molecule hyaluronic acid has strong absorption properties, quickly moisturizing the skin while activating collagen production and promoting the repair of the skin barrier. The lightweight, refreshing water-like texture provides a cooling hydration sensation, rapidly soothing skin heat and delivering instant cooling, offering a refreshing care along with sun protection.