This unique U-shaped mask bag is an original design. Essence fluids flow towards the bottom of the bag, which makes the cotton tissue absorb the essence thoroughly. However, in a square mask bag, essence fluids are always wasted at the bottom of a bag. Secondly, the star-shaped opening makes the bag very easy to tear open. The opening is 20mm from the top, equivalent to the average distance between a woman’s thumb and index finger. Such an arrangement makes it ergonomically easy to open. Last but not least, the two rounded corners at the top of the bag are specifically designed to avoid finger-cutting.