The Sex in the Shower knee pads make oral, doggie style, and other on your knees positions more comfortable. The foam pads are big enough to fit the knees comfortably and thick enough to protect them from the cold, hard floor below. Although they worked well in the shower and on carpet, they did slip on very smooth surfaces i.e. the tiles of my kitchen and of the bathroom itself (but not the shower). If you spend a lot of time on your knees in the shower or anywhere these would be a good choice.