XERIAL 50 extreme crème pieds by SVR LABORATOIRE DERMATOLOGIQUE. Its patented Pure Urea technology and its high concentration of salicylic acid that reduces calluses and stubborn hardness of very dry feet in just 7 days. Its non-greasy formula spreads easily and penetrates quickly. Its texture can crystallize at the end of the tube. This does not affect its effectiveness or its good tolerance, it is only the texture that changes.