Relife U-Life Moisturising Foot Cream - Urea 40% (50ml). Relife U-Life 40. Relife U-Life 40 is a moisturising smoothing foot paste with a 40% urea concentration. It effectively treats dry, extremely dry and rough skin to reduce and eliminate thickening skin due to its combination of moisturising urea and lactic acid to smooth and regenerate skin.. Benefits:. For dry, extremely dry and rough skin. Reduces and/or eliminates thickening of skin. Urea 40% for intense moisturising and smoothing action. Lactic acid brings intense smoothing and regenerating action. Paste-like formulation