"Klairs rich moist soothing mask is made 100% Pure cotton. It also contains half bottle of Rich Moisturizing Essence. If you use it, it would be like applying half bottle of Rich moisturizing essence on your face. In addition, as you might know, the essence is absorbed better and faster than hands if you use Klairs rich moist soothing mask sheet. In summer or hot weather, please put Klairs mask in the fridge for 3~5 mins before you use it. Then it quickly helps your face soothe some troubles such as a sunburn and skin troubles"