Used only once for snowboarding. Includes protectors for the buttocks and thighs, and knee protectors. Buttock protector is size M, knee protectors are size SS. I fell many times during my first snowboarding experience, but thanks to these protectors, I avoided any injuries! I am 153cm tall and of average build. I no longer need them, so I'd like to sell them. They are in a clean condition with no noticeable stains, but please refrain from purchasing if you are concerned.