This white polyester fabric snap-in liner is easy to remove on/off for cleaning and replacing. Featuring the water-repellent treatment, this liner well protects your outer decorative shower curtain and extends its life. 2 weighted bottom corner magnets help the shower curtain liner in place.The size 70x54 fits the standard size 71x74(no hooks needed) and 71x72(hooked) shower curtains with window. The size 70x66 fits the standard size 71x86(no hooks needed) and 71x84(hooked) shower curtains with window.