It is not necessary that all the shower curtains available in the market need to have hooks attached to them when you are hanging them on the curtain rod. You must make yourself clear before purchasing the curtain about the need for a hook whether your need it or not. The shower curtain for gray bathroom with no hooks includes the perforation or hole or even the buttons to get attached with the rod of the curtain by simply slipping through the rod. This will give your bathroom a seamless look and can also reduce the price of the whole setup by not buying hooks or rings for the curtain. So, it simply depends on your preference whether you want hooks or not.