These are solid at room temperature like a bar of soap, but when rubbed on the skin, a tiny amount melts and is transferred to the skin, leaving a highly moisturizing and very thin layer. 
Lotion Bars are made with a blend of oils, butters and wax. Since they have no water in them, there is no need for preservatives. This makes these bars a great 100% Natural alternative.
They can be scented with Essential Oils (EO) or Parabens and Phtalates Free Fragrance Oils (FO).