noprob Blue Azulene Hydrogel Mask 37g X 5eaA hydrating and soothing hydrogel mask infused with blue azulene to help calm heat and redness while delivering deep moisture. Despite its thick gel sheet, it adheres comfortably along facial contours and maintains hydration without drying out even after more than four hours of wear, making it suitable to use like a sleeping mask on days when the skin feels sensitive or dry.