Good night frozen film generally refers to jelly-like mask, which is mainly composed of water, water-soluble polymers and humectants. Some frozen films will also add alkaline substances or surfactants to help soften the stratum corneum and remove dirt.

Frozen film is actually a mask with chewing gum. The frozen film can be applied to the face like night cream to sleep and washed off the next day. This mask is generally used to moisturize the skin and is suitable for any skin type. If it is a hydrating cleansing mask, it needs to be washed off.

So whether you need to wash it off depends on the effect of the good night frozen film you use. If it is hydrating and moisturizing, most of it does not need to be washed off.