This is a cloth liner made of double gauze on both sides. In the center, there is one absorbent layer of flannel and a waterproof sheet. It prevents your important underwear from getting stained when you have slight leaks or a lot of vaginal discharge. Please use it as a regular cloth liner. It can be washed and used repeatedly, making it economical. It's good for the environment because it produces no waste. Since both sides are double gauze, it's soft and comfortable to wear. It can improve coldness and is also recommended for those trying to conceive. Size: Length x Width: Approximately 18cm x 15.5cm When worn: Crotch width: Approximately 6.5cm (There may be slight variations.) Materials: Skin side: Double gauze (wrinkle-processed) 1 layer Absorbent layer: Center Flannel 1 layer Underwear side: Double gauze 1 layer Breathable waterproof sheet: 1 in the center It's a 4-layer construction. Due to the double gauze on both sides, there may be some distortion in the finished shape. It will shrink slightly when washed. Please try it out and experience the comfort. For bulk purchases, you get a ¥100 discount for each additional set.