Pure Urea 50% + Salicylic Acid Exfoliating Concentrate 7 Days* Hard Skin Smoothing Care Rough and Dry Feet Skin Science tells us that hyperkeratosis develop as part of the skin's defence mechanism when excessive friction or pressure. This mainly occurs on the feet - on the soles, heels or toes. Thickened skin can turn into calluses or sometimes painful corns. It is important to choose cosmetic products that are compatible with thickened