Our pantyliner construction has 2 layers of protection overall: Our Mesh Liner, Leak Resistant Layer, which can hold up to 1 teaspoon or 1 small tampon equivalent over a reasonable time where you would wear a pantyliner of fluids. It also protects against leaks, as your pantyliner would expect to function. Our 3rd layer is an exterior performance fabric, which is lightweight, wicks sweat, is breathable and soft to the touch! You will forget you have them on.