It's their lotion with Salicylic Acid in it. It's suppose to help clear up the roughest of bumps and it really does! But I don't want to use it on the rest of my body so I just apply it to the parts with KP - which is just the back of my arms. My KP is a lot worse in the summer so this stuff allowed me to wear tank tops without feeling like the whole world was staring at the back of my arms. I can get away with not using it everyday in the winter though, so I'll usually switch between the SA lotion and whatever body lotion I have on hand.
I use Neutrogena and CVS brands of Pink Grapefruit Salicylic Acid Body Wash head to toe and it's awesome. I alternate like every other day between this and whatever other shower gel I have at the moment and I would not give up the SA shower gel for anything. It says for daily use and I don't find it harsh at all. I have found it also helps me not be itchy in the Winter.