Flexitol Rescue Hard Skin & Callus Balm is an intensely softening balm that has been formulated to soften hard skin build up on the feet. The highly effective formula contains 22% Urea and a blend of Alpha Hydroxy Acids (AHA's) which deeply penetrate and gently exfoliate hard or callused skin, without harming the skin underneath. It works to restore moisturising ingredients to the skin, promoting the appearance of healthy looking skin and softer feet within 3 days.