Due to the package lacking instructions, it is unclear if the smooth side of the pads are meant to go face down on the surface of which they are being used on or not. However, there is one for each knee; plenty of room. They can be placed as far apart or as close together as needed, or as it is most comfortable for the user. In a standard tub, they fit nicely next to each other with room to spare. They can work on the floor of a stand alone shower or even a sauna. Their usage does not need to be limited to water play or the bathroom though. They can be used on any flat surface making sexual activity on your knees more comfortable.
Be cautious of the fact that they can slip! It is less likely if the pressure is direct and vertical (like a person kneeling on them while giving oral). If the pressure is from an angle, say during doggie style sex, they can slip here and there. It is smart to test them in the area they are going to be used in prior to actual use.
The packaging is very simple. The two pads tightly fit into a cardboard box with images of a naked couple using the product on all sides. One side features a few other products from the company and provides a link: www.sexintheshower.net. Since it is cardboard, it is not good for storage after use until they dry.
These pads worked well for my partner and I. We used them most for giving oral in the shower. We both found them comfortable and easy to use. We love the simplicity!
They are comfortable to kneel on and take the pressure off the knee caps. On a floor that is completely smooth, the texture side can stick better in some instances and the opposite is also true. It is best to try it out yourself so injuries do not occur during play. Keep in mind that they can slip! Direct, downward pressure (like when you are kneeling and giving oral) is the least likely position for slippage. Doggie style sex has a tendency to make the pads slip here and there.